Canadian Journal of Law & Jurisprudence XXXIII No.2 August 2020, 369-395
© The Author(s) 2020. This is an Open Access article, distributed under the terms of the Creative Commons
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and reproduction in any medium, provided the original work is properly cited. doi: 10.1017/cjlj.2020.7
369
Judicial Discretion as a Result
of Systemic Indeterminacy
Sebastián A. Reyes Molina
1. Introduction
The topic of ‘judicial discretion’ has been at the center of the debate on legal
interpretation in the philosophy of law.1 In a general sense, ‘discretion’ here
refers to the exercise of a judgment by a decision-maker due to the lack of legal
constraints affecting one’s ability to decide a case. The most fundamental question on this topic is ‘do judges have discretion when interpreting the law?’ There
are three kinds of answers to this query. One kind of answer states that judges
never have discretion.2 Another kind of answer states that judges always have
discretion in interpretation.3 The third kind of answer states that judges sometimes have discretion when interpreting the law, and sometimes they do not.4
A common feature of all the aforementioned answers is that judicial discretion
presupposes the fact that interpretative problems in law can yield a plurality of
lawful outcomes. Since law provides a multiplicity of interpretative results for a
given case, judges, it is said, have the discretion to choose how law will be interpreted for its application.
The issue of the plurality of legal outcomes has been studied within a broader
issue in the legal theory termed, ‘legal indeterminacy’. Legal indeterminacy is the
multiplicity of norms that can be ascribed ex ante to a norm formulation. A norm
formulation is a positivized legal rule. A norm is the meaning ascribed to a norm
Previous versions of this paper have been presented at the Higher Seminar in Philosophy of Law at
Lund University, the Higher Seminar in Jurisprudence at Stockholm University, and at the SwedishFinnish PhD Conference on Legal Reasoning, Helsinki. I want to thank Jens Johansson, Sebastian
Lutz, Riccardo Guastini, Nicholas Wiltsher, Maarten Steenhagen, Álvaro Núñez Vaquero,
Alejandro Calzetta, Pedro Caminos, Patricia Mindus, Christian Dahlman, Oda E.W. Tvedt,
Donald Bello Hutt, Julieta Rábanos, and Julian González Escallón, for their helpful comments to
previous versions of this paper. I also want to thank Heather MacDonald for the language revision.
Sebastián A. Reyes Molina, Uppsala University, Department of Philosophy.
sebastian.reyes@filosofi.uu.se
1. For example, see Nicos Stavropolous, Objectivity in Law (Clarendon Law Press, 1996); Andrei
Marmor, Positive Law and Objective Values (Clarendon Law Press, 2001); David O Brink,
“Legal Interpretation, Objectivity and Morality” in Brian Leiter, ed, Objectivity in Law and
Morals (Cambridge University Press, 2001) 12; Matthew Kramer, Objectivity and the Rule
of Law (Cambridge University Press, 2007); Kent Greenwalt, Law and Objectivity (Oxford
University Press, 1992); Timothy Endicott, Vagueness in Law (Oxford University Press,
2000); Kenneth E Himma, “Judicial Discretion and the Concept of Law” (1999) 19:1
Oxford J Legal Stud 71. I will use both the expressions ‘judicial discretion’ and
‘discretion’ interchangeably.
2. Ronald Dworkin, “The Model of Rules” (1967) 35 U Chicago L Rev 14 and Ronald Dworkin,
A Matter of Principle (Harvard University Press, 1985) at 119-77.
3. Hans Kelsen, The Pure Theory of Law, translated by Max Knight (University of California
Press, 2008) at 350.
4. HLA Hart, The Concept of Law, 2nd ed (Oxford University Press, 2012) at 126-36.
The Canadian Journal of Law & Jurisprudence
August 2020
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370
Reyes Molina
formulation. Due to the indeterminacy of law, it is impossible to determine ex
ante which norm will be ascribed to a norm formulation when being interpreted.
This is not to say that lawyers cannot predict or try to predict legal outcomes
based on specific features of specific courts or judges. It only means that, from
a general standpoint, because law provides a multiplicity of answers to cases, it is
not possible ex ante determine how courts will decide such cases.
Judges’ discretion to interpret the law is related to legal indeterminacy. The
relationship between legal indeterminacy and judicial discretion can be stated as
follows: If law is indeterminate, then judges have discretion to decide cases.
Now, what are the causes of legal indeterminacy? There are two kinds of answers
to this question. The first kind of answer identifies the plurality of legal outcomes as
the consequence of having a multiplicity of legal materials with which to interpret
the law. I will call this first kind of answer the ‘realist’ account of legal indeterminacy because it was advanced by some American legal realists (e.g., Llewellyn).5
The second kind of answer identifies the causes of legal indeterminacy as the
manifestation of the indeterminacy of natural language. The plurality of legal outcomes is primarily the consequence of the ambiguity and vagueness of natural languages. I will call this second kind of answer the ‘natural language’ account of legal
indeterminacy. However, this is not a complete portrayal of law’s indeterminacy.
In this paper, I will defend a revised version of the realist account of indeterminacy that I call ‘systemic indeterminacy’. The systemic indeterminacy view
claims that the plurality of legal outcomes is the result of a typical rational legal
system,6 having both an interpretative code with more than one interpretative
directive and the absence of redundant legal rules. An interpretative code is a
set of rules regulating the interpretation of other rules in a legal system.
Redundant rules mean that different rules provide the same solution to a given
case. Since rational legal systems do not contain redundant rules, each interpretative directive will necessarily provide a different interpretative result. In other
words, in a typical rational legal system, legal indeterminacy is the result of specific features of the structure of that system (i.e., having an interpretative code
with more than one interpretative directive).
Roughly put, the main claim of this paper is the following: in a typical rational
legal system, legal adjudication is necessarily discretional. Discretion is the result
of a typical rational legal system having an interpretative code with more than one
interpretative directive and the non-liquet rule. The non-liquet rule is a rule that
prescribes an obligation to judges to decide all cases even when there are no legal
rules that govern the case. On the one hand, since typical rational legal systems do
5. See Karl Llewellyn, “Remarks on the Theory of Appellate Decision and the Rules or Canons
about How Statutes are to be Construed” (1950) 3:3 Vanderbilt L Rev 395. As Leiter points
out, “[t]he realists, however, argue that rational indeterminacy results from there being too
many conflicting but equally legitimate ways of interpreting and reasoning from the sources,
thus yielding conflicting legal rules”. Brian Leiter, “American Legal Realism” in Dennis
Patterson, ed, A Companion to Legal Philosophy and Legal Theory, 2nd ed (WileyBlackwell, 1996) at 253.
6. I will use both the expressions ‘legal system’ and ‘typical rational legal system’ interchangeably.
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Judicial Discretion as a Result of Systemic Indeterminacy
371
not have redundant rules, a plurality of interpretative directives will yield a plurality of interpretative results. On the other hand, due to the non-liquet rule,
judges are obligated to choose among the different interpretative results provided
by the interpretative code. By building a thesis on legal indeterminacy as the consequence of having a plurality of interpretative directives that necessarily yield
different results, I proceed to provide an account of discretion as a necessary feature of legal adjudication.
My argument is stated as follows:
a) a typical rational legal system has an interpretative code with more than one
interpretative directive;
b) a typical rational legal system contains the non-liquet rule;
c) necessarily, if a rational legal system has an interpretative code with more
than one interpretative directive and it contains the non-liquet rule, then in
this system, legal interpretation is discretionary;
d) thus, in a typical rational legal system, legal interpretation is discretionary.
This paper is structured as follows. In §2, I stipulate the definitions of the central
concepts of my paper. In §3, I provide an overview of both the treatment of legal
indeterminacy by the scholarship and my account of legal indeterminacy. In §4,
I provide reasons for accepting premises a) and b) of my argument. In §5, I provide a reason for accepting premise c) of my argument. In §6, I finish with the
conclusions.
2. Conceptual Clarification
In this section, I stipulate the meaning of the following terms: ‘legal interpretation’,
‘norm formulation’, ‘norm’, ‘discretion’, ‘legal indeterminacy’, ‘interpretative
directive’, ‘interpretative code’, ‘typical legal system’, and ‘rational legal system’.
Legal interpretation is the ascription of meaning to a text originated by a
source of law in accordance with certain interpretative guidelines (e.g., the norm
formulation ‘T’ means ‘S’).7
Judicial discretion is the exercise of judgment performed by a legal decisionmaker in making a choice among a closed list of alternatives, in which there is no
prevalence of one alternative over another.8 This distinction is in the following
order: 1) having discretion; and 2) exercising discretion. On the one side, ‘having
discretion’ is the possibility of choice. On the other side, ‘exercising discretion’ is
making a choice. Exercising discretion entails having discretion but not the other
way around.
Norm formulations are authoritative legal texts which originated from
the sources of law of a given community that have not yet been interpreted.
One example is the article 6n°3 of the Consolidated Version of the Treaty on
7. I will use both the expressions, ‘legal interpretation’ and ‘interpretation’ interchangeably.
8. I will use both the expressions, ‘judicial discretion’ and ‘discretion’ interchangeably.
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Reyes Molina
European Union states, “fundamental rights, as guaranteed by the European
Convention for the Protection of Human Rights and Fundamental Freedoms and
as they result from the constitutional traditions common to the Member States, shall
constitute general principles of the Union’s law”.9
Norms are the meaning that the interpreter has ascribed to a norm formulation
(i.e., the end result of the process of legal interpretation).10 For example, article
6n°3 of the Consolidated Version of the Treaty on European Union means that
the right to free movement of European citizens within the EU is a general principle of the Union’s law.
Legal indeterminacy is the multiplicity of norms that can be ascribed ex ante
to a norm formulation.
Interpretative directive is a second-order norm formulation that prescribes
how judges ought to interpret a first-order norm formulation. Examples of these
interpretative directives include, the plain meaning rule, the history of the legislature rule, and the intention of the legislature rule.
Interpretative code is the set of interpretative directives, techniques of reasoning (analogical reasoning, deductive reasoning, etc.), techniques of argumentation (a fortiori; a pari ratione; a maiori ad minus; a minori ad maius, etc.),
and, although they do not address issues of interpretation, meta-rules that solve
conflicts between rules (lex posteriori, lex specialis, legal hierarchies), contained
in a legal system to guide and constrain the interpretation of first-order norm
formulations.11
A typical legal system is one that shares features commonly ascribed to
Western legal systems. These features are, among others, upholding of the rule
of law, the interdiction of arbitrariness in adjudication, the justified exercise of
coercion by the state, the principle of legal certainty, solution of conflicts, the
enforcement and protection of rights, and the supremacy of the constitution.
A rational legal system is one that has formal/logical properties, such as the
avoidance of antinomies, gaps, and redundancies.12
3. Mapping the Scholarship
There are two prevailing accounts of legal indeterminacy within legal philosophy. As I stated in §1, I call these two accounts ‘the realist account’ of legal
9. Consolidated Version of the Treaty on European Union [2012] OJ C326/19.
10. Riccardo Guastini, “Disposición vs. Norma” in Rafael Escudero & Susanna Pozzolo, eds,
Disposición vs. Norma (Palestra Editores, 2011) 136. Regarding my definitions of norm formulations and norms, I follow Bulygin’s account on the subject. He claims that
“[a] norm-formulation is purely linguistic entity, a sentence, whereas a norm is an interpreted
sentence, that is, a linguistic entity along with its meaning”. Eugenio Bulygin, Essays in Legal
Philosophy (Oxford University Press, 2015) at 308.
11. Torben Spaak, Guidance and Constraint: The Action-Guiding Capacity of Theories of Legal
Reasoning (Iustus Förlag, 2007) at 43 and Pierluigi Chiassoni, “Legal Interpretation Without
Truth” (2016) 29 Revus 93.
12. Alf Ross, On Law and Justice (The Lawbook Exchange, 1959) at 131-32; Carlos Alchourrón
& Eugenio Bulygin, Normative Systems (Springer-Verlag, 1971) at 60-62; Carlos Nino,
Introducción al análisis del derecho (Ariel Derecho, 2013) at 272-92.
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Judicial Discretion as a Result of Systemic Indeterminacy
373
indeterminacy and the ‘natural language’ account of legal indeterminacy, respectively. Both accounts are not mutually exclusive. Arguably, legal systems are
often affected by both kinds of indeterminacy. While the realist account claims
that legal indeterminacy is the result of the multiplicity of legal materials,
the natural language account claims that legal indeterminacy is the result of the
indeterminacy of natural languages. To the extent that the legal materials are formulated in natural language, they are also subject to linguistic indeterminacy.
In this section, I will present an overview of these two accounts with the purpose of situating my claim within the scholarly debate on legal indeterminacy.
3.1. The ‘Realist Account’ of Legal Indeterminacy
Before I describe the ‘realist account’, a comment is in order. I do not claim that
there is an intrinsic connection between American legal realism and legal indeterminacy. This connection is, as far as I see, purely historical. It is a matter of fact
that this kind of claim about the indeterminacy of law has been held by some
authors that are part of the American legal realist movement.
As stated in §1, the realist account holds that law is indeterminate due to the
multiplicity of legal materials that yield competing but equally legally valid results.
By ‘legally valid’ I mean that the decision produces legal consequences.13 As
Kress notices, “[i]n adjudication, law is indeterminate to the extent that authoritative legal materials and methods permit multiple outcomes to lawsuits.”14
According to Llewellyn,
[o]ne does not progress far into legal life without learning that there is no single
right and accurate way of reading one case, or of reading a bunch of cases : : :
[i]n the work of a single opinion-day I have observed 26 different, describable ways
in which one of our best state courts handled its own prior cases, repeatedly using
three to six different ways within a single opinion.
What is important is that all 26 ways (plus a dozen others which happened not to
be in use that day) are correct.15
The realist account explains legal indeterminacy by resorting to an unclear set of
factors that include, inter alia, the personal traits of judges, value-preferences of
the interpreter, legal materials (which includes scholarly work), and methodologies used for interpretation. It is the interplay of the aforementioned factors that
yield competing but equally legally valid results. This interplay depends mostly
on the personality of the judge. As Frank points out,
13. As the reader may have noticed, the expression ‘legally valid’ used here is different from the
three notions of ‘validity’ advanced by Kelsen. That is, validity as: 1) existence; 2) binding
force; and 3) efficacy. For an analysis of the three Kelsenian notions of validity, see
Bulygin, supra note 12 at 81-83.
14. Ken Kress, “Legal Indeterminacy” (1989) 77 Cal L Rev at 283.
15. Llewellyn, supra note 5 at 395.
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Reyes Molina
[t]hose who today complain of any ‘judicial legislation’ in statutory interpretation
are complaining of the intrusion of the judges’ personalities. However, : : : legal
thinkers, in increasing numbers, have shown that the personal element in statutory
construction is unavoidable : : : [t]he creativeness of the judges should always be
limited; but, within proper limits, it is a boon not an evil.16
If, according to the realist account, the judges’ personality is ‘unavoidable’ when
interpreting law, then legal outcomes will vary according to the personality of the
judge who decides the case. In other words, the content of the law is insufficient
to ensure a single legal answer. This point has been stressed by Leiter in his
reconstruction of the realist account. For him, problems of indeterminacy are
problems that are associated with what he calls, ‘the class of legal reasons’.
The class of legal reasons is comprised of the sources of law, the interpretative
techniques of a given legal system, the legitimate way of deciding over the quaestio facti, and the techniques of reasoning (e.g., analogical reasoning, a fortiori
arguments, and deductive reasoning).17 He claims that the class of legal reasons
is indeterminate and insufficient to both cause the judge to reach only one outcome and to justify only one outcome.18 In other words, for the realist account,
what causes and justifies a legal outcome is derived from both legal and extralegal factors. That law is not enough to cause or justify a legal outcome does not
mean that we cannot predict the courts’ decisions. The realist account leaves open
the possibility to predict legal outcomes on the basis of discernible patterns that a
specific court/judge will follow when deciding similar cases. As Leiter points out,
“[j]udicial decisions : : : fall into discernible patterns (making prediction possible), though the patterns are not those one would expect from the existing legal
rules. Rather, the decisions fall into patterns correlated with underlying factual
scenarios of the dispute at issue”.19 For example, suppose that two people come
to the lawyer’s office saying that they were wrongfully terminated from their job.
They want to sue their employer, but they are unsure whether the grounds for the
lawsuit are strong enough to ensure a favourable result. Following the realist
account, the best way to provide satisfactory counseling is knowing which judge
could potentially decide the case. Once the judge is identified, then the lawyer
will base the legal advice on knowledge about the political allegiances, religious
beliefs, and moral commitments of the potential judge. The lawyer’s knowledge,
in turn, will be based on the historical records of the judge’s decisions on similar
cases. The task of the lawyer, then, is to identify that judge’s decision-patterns in
similar cases to the one that requires their services, as well as the different factors
that inform said patterns.
16. Jerome Frank, “Words and Music: Some Remarks on Statutory Interpretation” (1947) 47:8
Colum L Rev at 1264.
17. Brian Leiter, Naturalizing Jurisprudence: Essays on American Legal Realism and Naturalism
in Legal Theory (Oxford University Press, 2007) at 9. Both the notions of ‘legal materials’ and
‘the class of legal reasons’ seem to overlap. However, prima facie, the notion of ‘class’ is
broader insofar it encompasses the decision over the quaestio facti, which arguably is not covered by the notion of ‘legal materials’.
18. Brian Leiter, “Legal Indeterminacy” (1995) 4 Legal Theory at 481.
19. Leiter, supra note 16 at 62.
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Judicial Discretion as a Result of Systemic Indeterminacy
375
3.2. The ‘Natural Language’ Account of Legal Indeterminacy
The natural language account holds that certain features of natural languages
bring about legal indeterminacy.20 These features of natural language are ambiguity and vagueness. On the one hand, ambiguity in law arises when a norm formulation can be interpreted in different ways. On the other hand, vagueness in
law manifests as hard cases. These are borderline cases in which it is indeterminate if a specific state of affairs can be subsumed in the class of state of affairs that
a norm formulation governs.
In this subsection, I focus on two versions of the natural language account.
I call these versions ‘the double-indeterminacy’ thesis and ‘the open texture’ thesis respectively. As I will demonstrate, these two versions are related in that the
double indeterminacy version entails the open texture version.
The double-indeterminacy version is held by Guastini.21 This version claims
that law is ambiguous and vague.22 However, ambiguity and vagueness are to be
found in different stages within the process of interpretation. Guastini points out
that the term ‘interpretation’ is ambiguous and it can refer to, at least two kinds of
activities that the judge engages in when deciding a case: 1) interpretation in
abstracto; and 2) interpretation in concreto.23 Interpretation in abstracto is the
task of ascribing meaning to a legal text (e.g., the legal rule ‘R’ means ‘T’).
This kind of interpretation deals with ambiguity. Under the double indeterminacy
thesis, ambiguity refers to the multiplicity of norms that can be ascribed to one
norm formulation.24 In other words, prior to the act of interpretation, a plurality
of interpretations can be ascribed to a norm formulation, thereby rendering them
indeterminate (e.g., the legal rule ‘R’ can mean ‘T1’, ‘T2’, ‘T3’, and so on).
20. Timothy Endicott, “Law is Necessarily Vague” (2001) 7 Legal Theory at 379-85; Riccardo
Guastini, “Rule-Scepticism Restated” in Leslie Green & Brian Leiter, eds, Oxford Studies
in Philosophy of Law, vol 1 (Oxford University Press, 2011) at 145-47; Leiter, supra note
16 at 10-12; Pierluigi Chiassoni, “Defeasibility and Legal Indeterminacy” in Jordi Ferrer &
GB Ratti, eds, The Logic of Legal Requirements: Essays on Defeasibility (Oxford
University Press, 2012) at 152-60; Paolo Comanducci, “Principios jurídicos e indeterminación
del derecho” 21:2 Doxa 89.
21. Riccardo Guastini, “Problemas de interpretación” (1997) 7 Isonomía at 121-31; Riccardo
Guastini, “A Sceptical View on Legal Interpretation” (2005) Analisi e Diritto at 140-44
[Guastini, “Sceptical View”]; Guastini, supra note 19 at 139-61; Riccardo Guastini, La
sintáxis del derecho (Marcial Pons, 2016) at 335-40; Riccardo Guastini, “A Realistic View
on Law and Legal Cognition” (2015) 27 Revus at 47-54 [Guastini, “Realistic View”].
22. Guastini, “Realistic View”, supra note 20 at 46.
23. Guastini, “Sceptical View”, supra note 20 at 142.
24. This way of understanding ambiguity differs from the way that philosophers have understood
it. Although I will not develop the different kinds of ambiguity, suffice it to say that the common understanding of this phenomenon refers to the property enjoyed by signs that bear a
plurality of interpretations. However, in a more specific way, ambiguity refers to two or more
lexical entries corresponding to the same word that can or cannot be related. Thus, for example,
a bank can mean both a financial institution and a riverside. This is not the way that Guastini
understands the ambiguity of norm formulations. It is not the case that norm formulations have
different unrelated meanings, but that each norm formulation can be reworded in a different,
but somewhat related, way in light of interpretative directives used by the interpreter. In this
sense, issues of legal interpretation are more similar to the phenomenon of polysemy, in which
the different meanings ascribed to a lexeme are related, than to ambiguity.
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Reyes Molina
Interpretation in concreto is the subsumption of a case within the class of cases
that an interpreted in abstracto legal provision governs. This kind of interpretation deals with vagueness. Sometimes it is indeterminate if the case at hand
belongs to the class of cases governed by the meaning ascribed to the legal rule
by the interpreter (e.g., if there is a norm formulation that prohibits the entrance
of animals to government buildings, do service animals count as an animal for
the purpose of this rule?). The cases that interpretation in concreto covers bear
resemblance to the easy cases/hard cases distinction with which legal philosophers are acquainted.
The second version of the natural language account is the open texture thesis
promoted within the legal scholarship by Hart.25 The open texture thesis states
that all rules have a core of settled meanings and a penumbra zone where its
application is indeterminate.26 Since law is a manifestation of natural language,
legal rules will suffer from open texture. According to Hart,
[t]here must be a core of settled meaning, but there will be, as well, a penumbra of
debatable cases in which words are neither obviously applicable nor obviously
ruled out. These cases will each have some features in common with the standard
case; they will lack others or be accompanied by features not present in the standard
case.27
He argues that because norm formulations are posited in general terms aimed at
regulating particular cases, there will be both cases that will be covered by the
plain meaning of the norm formulation, and cases that will fall into its penumbra,
zone rendering its application indeterminate. As Hart notes,
[a]ll rules involve recognizing or classifying particular cases as instances of general
terms, and in the case of everything which we are prepared to call a rule it is possible
to distinguish central clear cases, where it certainly applies and others where there
are reasons for both asserting and denying that it applies. Nothing can eliminate this
duality of a core of certainty and penumbra of doubt when we are engaged in
25. HLA Hart, “Positivism and the Separation of Law and Morals” (1958) 71:4 Harv L Rev
593 [Hart, “Positivism”]; Hart, supra note 4 at 128-36. Although, as some scholars have noted,
Hart did not invent the label ‘open texture’ but rather he used it to analyze legal interpretation.
See Frederick Schauer, “On the Open Texture of Law” (2013) 87 Grazer Philosophische
Studien 197; Brian Bix, Law, Language, and Legal Determinacy (Clarendon Press, 2003)
at 10-14. The use of the ‘open texture’ label is credited to Waismann. See Friederich
Waismann, “Verifiability” in WC Kneale, DM Mackinnon & Friederich Waismann, eds,
Proceedings of the Aristotelian Society, Supplementary Volume, Analysis and Metaphysics,
vol 19, (1945) 119. His use, however, differs from Hart’s in the sense that, unlike Hart, he
does not claim that vagueness and open texture are the same thing. Waismann clearly distinguishes vagueness from open texture,
[v]agueness should be distinguished from open texture. A word which is actually used
in a fluctuating way (such as ‘heap’ or ‘pink’) is said to be vague; a term like ‘gold’,
though its actual use may not be vague, is none-exhaustive or of an open texture in the
we can never fill up all the possible gaps through which a doubt may seep in. Open
texture, then is something like possibility of vagueness. Ibid at 123.
26. Hart, supra note 4 at 124-27.
27. Hart, “Positivism”, supra note 24 at 607.
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Judicial Discretion as a Result of Systemic Indeterminacy
377
bringing particular situations under general rules. This imparts to all rules a fringe of
vagueness or ‘open texture’.28
For Hart, ‘open texture’ means vagueness.29 The fact that according to Hart, all
rules have a fringe of vagueness or open texture suggests that he uses both terms
synonymously. Further support to this claim can be found in the classic examples
of the ‘no vehicles in the park’ rule that he gives in order to explain the open
texture thesis. In this example, the judge must answer the question of whether
an electrically propelled motor car is a vehicle or not. What Hart is describing
is a borderline case regarding the scope of the term vehicle. The ‘open texture’
thesis stresses the fact that law qua manifestation of natural language is vague and
in borderline cases, law is necessarily indeterminate.
Note that the double indeterminacy thesis entails the open texture thesis. In the
next subsection, I will provide a general overview of the account that I advance in
order to localize it within the scholarly debate.
3.3. On the ‘Systemic Indeterminacy’ Account
In this subsection, I will advance a revised version of the realist account that I call
‘systemic indeterminacy’. This account holds that the plurality of legal outcomes
is the consequence of a typical rational legal system having an interpretative code
with a multiplicity of interpretative directives. Since the source of the plurality of
interpretative results is the plurality of interpretative directives, the systemic
indeterminacy entails the realist account but not the other way around. This is
because the interpretative directives are a subset of what the realist account refers
to as ‘legal materials’. Since I identified the source of indeterminacy with a specific kind of legal rule (i.e., the interpretative directives), my account is narrower
than the realist account. The systemic indeterminacy account places emphasis on
structural features of legal systems (e.g., interpretative codes), instead of features
of natural languages and/or extra-legal factors, such as the personality of judges,
value preferences of the interpreter, legal education, and so on. To the extent
that the interpretative code is posited in natural language, my account does
not exclude the natural language account.
The systemic indeterminacy thesis stresses the relationship between the number of interpretative directives and the number of interpretative results. By this,
I mean that a legal system will have the same number of interpretative results as
the number of interpretative directives that are contained in the interpretative
code. As will be developed further in §5, because typical rational legal systems
do not allow for redundant norms—what I call the non-redundancy clause—
necessarily different interpretative directives will provide different interpretative
results. Roughly put, the connection between interpretative codes and the nonredundancy feature of typical rational legal systems is the following: since typical
28. Hart, supra note 4 at 123.
29. Schauer, supra note 24 at 200.
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rational legal systems do not allow for redundant rules necessarily each interpretative directive provides a different interpretative result.
It is not surprising that the fact that interpretive codes would contribute to legal
indeterminacy could seem counterintuitive. After all, it is a common assumption
that the deficiencies of the semantic content of language call for the need of interpretative directives that allow the deficiencies to be addressed. In other words,
typical rational legal systems try to reduce the indeterminacy of natural language
that affects law through a set of second-order rules known as interpretative
directives/canons of interpretation. However, the interpretative code cannot complete eliminate indeterminacy. Interpretative codes cannot eliminate indeterminacy because the interpretative directives are also affected by the indeterminacy of natural language. As Hart points out, “[c]anons of ‘interpretation’ cannot
eliminate, though they can diminish, these uncertainties; for these canons are
themselves general rules for the use of language, and make use of general terms
which themselves require interpretation”.30 Hart’s claim relies on the natural
language account of legal indeterminacy. He stresses the fact that the canons
of interpretation are affected by the open texture of the words and are thus
susceptible to vagueness themselves. Therefore, in cases in which the canons
of interpretation are in themselves vague, they will fail to reduce indeterminacy
of law.
The systemic indeterminacy account does not rely on the open texture of
the interpretative code to hold that the canons of interpretation contribute to legal
indeterminacy. Under my account, the plurality of legal outcomes is caused by a
multiplicity of interpretative directives, independent of their semantic content.31
In §1, I stated that there is a relationship between legal indeterminacy and discretion. In the next section, I will present an overview of this relationship in the
three accounts of legal indeterminacy that I have laid down.
3.4. On the Relationship between Legal Indeterminacy and
Judicial Discretion
The existence of a relationship between legal indeterminacy and discretion is a
point that all three accounts of legal indeterminacy share. In all these accounts,
discretion can be formulated as a choice made by the interpreter. Both the content
of the choice and its constraints will vary depending on the account that is analyzed. In this subsection, I will provide an overview of judicial discretion and its
relation to legal indeterminacy. The purpose for this is twofold: 1) to define this
relationship; and 2) to say something about the scope of judicial discretion.
The realist account holds that it is possible to interpret the law in multiple
different ways due to the multiplicity of legal materials. This account
30. Hart, supra note 4 at 126.
31. Sebastián Reyes Molina, “Interpretación jurídica y Legal Craft” in Pierluigi Chiassoni, Paolo
Comanducci & GB Ratti, eds, L’arte della distinzione: Scritti per Riccardo Guastini, vol 2
(Marcial Pons, 2019) at 280.
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379
acknowledges the fact that judges and lawyers can ascribe and justify competing
legal results by using the legal materials available to them. Which legal material
will be used and how that legal material will be used will depend on a choice
based on criteria that escape the law. In other words, when determining the
use of the legal materials, judges exercise discretion. As Leiter points out,
“[For realists,] lawyers and judges have this interpretive latitude often enough
to inject a considerable degree of indeterminacy into law”.32 Recall the distinction of having discretion compared to exercising discretion. The realist account
explains having discretion (i.e., the potential of choosing) based on the multiplicity of legal materials. The exercise of discretion, (i.e., the choice itself) is
explained by a complex set of non-legal factors.
The two versions of the natural language account treat discretion in a similar
way. The double indeterminacy thesis holds that discretion is exercised in both
interpretation in abstracto and interpretation in concreto. When judges interpret
in abstracto, they need to choose among the different norms that can be ascribed
to the norm formulation, thus putting an end to the ambiguity affecting the uninterpreted norm formulation. When judges interpret in concreto, discretion is exercised in borderline cases (i.e., when it is indeterminate whether the specific case
can be subsumed in the general class of cases governed by the norm).
The open texture account claims that in cases that fall into the penumbra zone
of a legal rule, judges have the discretion to settle the question if a certain case
falls into the core meaning of the norm formulation they want to apply. As Hart
states,
[w]hen the unenvisaged case does arise, we confront the issues at stake and can then
settle the question by choosing between the competing interests in the way which
best satisfies us. In doing so we shall have rendered more determinate our initial
aim, and shall incidentally have settled a question as to the meaning, for the purposes of this rule, of a general word.33
From the standpoint of the distinction between having and exercising discretion,
according to the natural language approach, judges have discretion because of
ambiguity and vagueness. Moreover, judges exercise discretion when deciding
issues of ambiguity and vagueness.
The systemic indeterminacy account holds that discretion is the result of having an interpretative code with more than one interpretative directive and the nonliquet rule.34 The relationship between the non-liquet rule and discretion could be
stated as follows: although there are different interpretative results to decide a
case, judges are legally obliged to choose the interpretative directive on which
they will justify the interpretation of the norm formulation that will govern
the case. Since the non-liquet rule prescribes the obligation to decide tout court,
this decision refers to a choice among the interpretative directives. Moreover, this
32. Leiter, supra note 16 at 73.
33. Hart, supra note 4 at 129.
34. I develop this in depth in §4 and §5.
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decision must be taken even if the interpretative code does not contain legal rules
that guide the use and/or establish hierarchies among the interpretative directives.
The systemic indeterminacy account claims that judges have discretion
because of the multiplicity of interpretative directives contained in the interpretative code. It also claims that judges exercise discretion because of the nonliquet rule. Thus, if judges have discretion, they are legally obligated to exercise
it. Whilst it is unclear if having discretion entails its exercise in both the realist
account and the natural language account, it is clear that having discretion entails
exercising such discretion in the systemic indeterminacy account.
The notion of discretion used in all the accounts of legal indeterminacy analyzed in this subsection can be reconstructed as a choice. The content of the
choice will slightly vary from one version to another. In both the realist account
and the systemic indeterminacy account, the choice is about the legal materials to
be used and interpreted. However, in the natural language account, both versions
seem to share that the content of the choice ultimately has to do with settling the
‘question of the meaning’ of a norm formulation that is either ambiguous and/
or vague.
A point of divergence regarding discretion is that it is possible to identify the
issue regarding the scope of discretion in these accounts. Discretion in legal
interpretation will be present in borderline cases. This is true for both Hart’s
‘open texture’ account and Guastini’s account of the interpretation in concreto.
Thus, for these accounts, discretion is a marginal phenomenon in legal interpretation because the majority of cases will fall within the core meaning of the norm
formulation. This is not the case for the realist account, the systemic indeterminacy account, and Guastini’s account of the interpretation in abstracto. For all
these accounts, discretion is present in all litigated cases.
The realist account, the systematic account, and the natural language account
help to identify at which stage within the process of adjudication judges will have
discretion. In addition, the combination of these different accounts of indeterminacy show that this phenomenon is present in all litigated cases.
In the next section, I will develop the main argument of this paper. This
argument consists of three premises and the conclusion. In §4 I provide reasons
to accept premise a) and b). Premise c) will be developed in §5.
4. Main Argument
Recall the main argument of this paper:
a) a typical rational legal system has an interpretative code with more than one
interpretative directive;
b) a typical rational legal system contains the non-liquet rule;
c) necessarily, if a rational legal system has an interpretative code with more
than one interpretative directive, and it contains the non-liquet rule, then in
this system legal interpretation is discretionary;
d) thus, in a typical rational legal system legal interpretation is discretionary.
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In this section, I will provide reasons to accept premise a) and b). Premise a) is
supported by a two-part reason. Premise b) is supported by three independent
reasons.
4.1. On premise a): Interpretative Codes with Multiple
Interpretative Directives
In §4.1.1 and §4.1.2, I provide reasons for the plausibility of the claim that in
typical rational legal systems, interpretative codes contain more than one interpretative directive. Premise a) is supported by a two-part reason.
4.1.1. Part 1 Reason for Premise a): Providing Legal Justification for the
Interpretation of a Norm Formulation
In §2, it was stated that there are some features of Western legal cultures that are
contained in typical legal systems. Two of these features are the upholding of the
rule of law and the justified exercise of coercion. In general, these two features
are aimed at controlling and limiting the exercise of state power. This aim is fulfilled in different ways. One way is the legal obligation that state authorities have
to provide legal justification for their decisions. One method of providing legal
justification for their decisions is by having legal grounds for the judge’s interpretation of norm formulations. Interpretative codes with more than one interpretative directive provide legal grounds for the interpretation of norm formulations.
Conversely, if judges do not interpret the norm formulation based on one of the
interpretative directives then that interpretation lacks legal grounds.
Notice that interpreters do not need to use all of the interpretative directives
when interpreting a norm formulation. It is sufficient for a norm to be legally
valid if the interpreters grounded their interpretation of the norm formulation
in only one interpretative directive. Following Spaak,
one factor that is relevant to the interpretation of statutes: the literal meaning of the
statutory text, consistency and coherence in the legal system, legislative intent, and
statutory purpose, respectively. These interpretative arguments [as he calls them] are
legal, not moral or political, in the sense that their common starting-point is the law
itself. They are also fundamental in the sense that almost any controversy about the
content of the major premise of the legal syllogism can be framed in terms of them.35
A legal system without an interpretative code will have at minimum, a deficit in
legal reasons on which the norm ascribed to the norm formulation in which it
could be grounded. This is not to say that there would be no reasons at all to
justify the interpretative decision; however, it does mean that these reasons will
not be legal in origin.
35. Spaak, supra note 10 at 44.
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Notice that the reason presented in this subsection argues for accepting the
claim that typical legal systems will have interpretative codes. It does not say
anything about the fact that these interpretative codes will have a multiplicity
of interpretative directives. This second feature (i.e., a multiplicity of interpretative directives) will be addressed in the next subsection.
4.1.2. Part 2 Reason for Premise a): Preventing Arbitrariness and Limit
Vagueness and Ambiguity
The second part of the reason for premise a) consists of two parts. The first part
holds that interpretative codes with more than one interpretative directive prevent arbitrariness in legal interpretation. Recall that in §2, interdiction of arbitrariness is one of the features of typical legal systems. To both avoid
uncertainty and reduce indeterminacy in legal decisions, interpretation of norm
formulations is guided by the interpretative codes. Conversely, the lack of interpretative codes will amount to, at minimum, discretion, and at maximum, arbitrariness when interpreting the law. The interpretative codes will provide a set
of legal reasons by which the interpreter legally ought to support a decision
about which norm will be ascribed to the norm formulation. Since the interpretative directives are finite in number, judges will be constrained regarding the
number of reasons upon which they can base their decision. Thus, a finite number of interpretative directives will prevent arbitrariness in adjudication. By
providing a method of interpretation, the interpretative codes will prevent
arbitrariness in interpretation albeit the matter of discretion is still debatable.
A lack of interpretative codes will allow for unknown or extremely unclear
methods by which interpreters apply the law.
The second part holds that interpretative codes with more than one interpretative directive limit the vagueness and the ambiguity of norm formulations. In
order to reduce the effects of the natural language indeterminacy in legal adjudication, the interpretative codes tend to contain a multiplicity of interpretative
directives. Of course, a multiplicity of interpretative directives is not a requirement sine qua non for having an interpretative code. It is possible to imagine a
legal system with only one interpretative directive (e.g., the plain meaning of the
text rule). Such a legal system would find problems, for instance, whenever a
norm formulation that contains vague formulas must be applied or whenever
the meaning of a word has changed in a given society, and so on. It seems that
in those types of cases, the interpretative code would not be able to achieve its
goal of reducing indeterminacy.
4.2. On Premise b): The Non-Liquet Rule
The term non-liquet can be translated as ‘it is not clear’ and it refers to the situation in which a competent court fails or abstains to decide a case either because
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there is no law that regulates the matter or the existent law is unclear.36 In law,
there is a general prohibition to non-liquet. This prohibition can be expressed as a
rule that prohibits judges from not deciding cases. I call this rule, the non-liquet
rule. This rule stems from a general principle in law that is known as the principle
of completeness. In general, the principle of completeness states that legal systems ought to provide a solution to every case.
The principle of completeness can be subjected to two readings. I call these
two readings the strong and the weak reading, since the weak reading implies the
strong reading. The strong reading claims that the principle of completeness
binds both the legislative and the judiciary power. In other words, both the legislative and the judiciary ought to provide solutions to every case. The way that
the legislators comply with the strong reading is by introducing the so-called
‘closure’ rules. A closure rule is “a rule that would qualify deontically all actions
not already qualified by the system in question”.37 An example of a closure rule in
criminal law is the nullum poena sine lege rule, which can be formulated roughly
as follows: it is prohibited to punish an action that is not prohibited by law. An
example of a closure rule in public law is the following: everything that is not
allowed is forbidden. These examples illustrate the fact that all actions that have
not been deontically qualified by the law in a specific way fall under these closure
rules and there are thus, deontically qualified in a general way. In other words,
closure rules provide necessary guidance to the judge for determining the solution
to cases that encompass actions that are not specifically deontically qualified by
the law.
The weak reading claims that the principle of completeness prescribes a duty
to the judges to decide every case, even when there are no norm formulations that
govern those cases. Thus, the weak reading’s claim only binds the judiciary
power. For example, article 4 of the French Code civil prescribes that “[a] judge
who refuses to give judgment on the pretext of legislation being silent, obscure or
insufficient, may be prosecuted for being guilty of a denial of justice”.38 Another
example of a non-liquet rule can be found in article 76, paragraph 2 of the Chilean
Constitution that prescribes that “[a]fter intervention is requested in legal form
and for matters of their competence, [the courts] cannot excuse themselves from
exercising their authority, not even in the absence of a law to resolve the dispute
or issue submitted to their decision”.39
One of the defining features, if not the defining feature of the courts, is the
power to decide disputes. This power is granted by competence norms that serve
as a ground for the legal consequences that such decisions bear. However, courts
36. For a historical approach of the non-liquet rule, see Alfredo Mordechai Rabello, “Non Liquet:
From Modern Law to Roman Law” (1974) 9 Israel L Rev 63.
37. Alchourrón & Bulygin, supra note 11 at 135.
38. Original text: “Le juge qui refusera de juger, sous prétexte du silence, de l’obscurité ou de
l’insuffisance de la loi, pourra être poursuivi comme coupable de déni de justice”.
39. Original text: “Reclamada su intervención en forma legal y en negocios de su competencia, no
podrán excusarse de ejercer su autoridad, ni aun por falta de ley que resuelva la contienda o
asunto sometidos a su decisión”.
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not only have the power to decide but also the legal obligation to do so. This
obligation, according to the weak reading of the principle of completeness, is
imposed by the non-liquet rule. In other words, judges are bound to decide a legal
matter even if there is a lack of norm formulations that govern it.
Although it is possible to imagine a legal system without the non-liquet rule,
such legal systems will allow for the possibility of Déni de Justice and thus fail to
both solve conflicts and protect rights.
In §4.2.1, §4.2.2, and §4.2.3, I provide three reasons to support premise b).
Although these reasons are independent of each other, they are all related to
the role that legal systems play within a given community.
4.2.1. Reason 1 for Premise b): Law is Supposed to Solve Conflicts
There is a widely shared idea that law is a tool for solving conflicts among members of a community. This idea is popular in private law and procedural law literature. The non-liquet rule is in line with the conflict-solving view. Since it is
debatable whether the non-liquet rule is a conceptual requirement of a legal system, one could argue against the idea that legal systems have this type of rule.
Thus, someone could argue that it is possible to imagine a legal system without
the non-liquet rule in which courts do not decide cases because they think that
someone else should decide them. This can be termed, ‘jurisdiction objection’.
This objection could go as follows: it is possible that courts would consider not
having the competence to decide such matters because it falls in the jurisdiction
of a different institution. In other words, the court does not have the competence
to adjudicate a case. This is something that happens, for instance, in constitutional
litigation. Constitutional courts can decide that the matter should be resolved by
the legislative power and not by constitutional courts.
Before addressing the ‘jurisdiction objection’, it is necessary to distinguish
two kinds of legal decisions. There are two types of decisions in law: 1) substantive; and 2) adjectival. Substantive decisions are those that provide a solution to a
legal case based on the merits of the case (e.g., the decision of awarding compensation for pecuniary loss). Adjectival decisions are those that solve or put
an end to procedural matters (e.g., decisions about the legal competence of the
court to decide a case).
Having the substantive/adjectival distinction in mind, one can answer the
‘jurisdiction objection’ along the following lines. This objection is based on a
narrow conception of ‘legal decision’. This narrow conception assumes that
law can only provide substantive answers. Either the action is granted or denied,
and thus, it leaves out issues of procedural nature that do not deal with the litigated matter. However, it is possible to argue for a broad conception of ‘legal
decision’ that encompasses the decisions that do not provide a legal solution
to the case. The broad conception of legal decision states that the obligation
to decide does not ensure specific kinds of decisions. By this, I mean that a
decision can be either a substantive or adjectival decision. The latter type would
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Judicial Discretion as a Result of Systemic Indeterminacy
385
not resolve the matter per se but it would put an end to the case regarding the
participation of the specific court that was required to solve the matter at hand.
Thus, a decision over issues of legal competence would satisfy the obligation
imposed by the non-liquet rule. This does not mean that the case does not have
a solution or it would not be solved, but rather that the legal system has a different
instance or institution with the competence to do so. For the broad conception of
the non-liquet rule, the duty to decide will be fulfilled whenever the legal systems
provide an answer, either substantive or adjective, to a case.
4.2.2. Reason 2 for Premise b): No Decision Would Make the Legal System
Inapt for Enforcement
Besides solving conflicts, the law, at least how it has been conceived after the
Second World War, is a method of ensuring and enforcing the protection of
rights.40 From the standpoint of enforceability of legal rights, the rule of nonliquet provides a safeguard for the enforcement of rights in situations in which
there are no norm formulations that can govern the case. The rule of non-liquet
would be the legal system’s answer to inaction in the face of legal gaps or borderline cases.
A legal system without a non-liquet rule would be ineffective in its task of
protecting rights whenever borderline cases or legal gaps arise and the judges decide
to remain silent on the matter by not providing a legal solution. Furthermore, law
enforcement in a legal system without the non-liquet rule will be dependent on the
whim of the judge when deciding both clear and borderline cases.41
4.2.3. Reason 3 for Premise b): Legal Certainty Requires a Decision
The non-liquet rule functions as a safeguard of the Rule of Law to the extent that
it prevents the Déni de Justice and contributes to legal certainty.42 It does so by
assuring that an answer, whatever this answer is, will be given by the legal system
whenever a legally relevant conflict arises.
Legal systems ensure that providing answers to cases prevents the undesirable
consequence of having conflicts extended over indefinite periods of time.
Conversely, the lack of a response from the legal system makes both the goals
of ensuring and protecting rights and solving conflicts among people unattainable
for cases that judges decide to remain silent on.
A legal system without a non-liquet rule will depend on the judge’s whim to
decide a case, thus, making legal certainty impossible.
40. On law as a tool for protection of rights see for example, Mauro Barberis, Ética para Juristas
(Trotta, 2008); Luigi Ferrajoli, Derecho y Razón: Teoría del garantismo penal (Trotta, 1995).
41. As the reader may notice, I distinguish the notion of ‘discretion’ from ‘whim’. A ‘whim’ is a
sudden desire that lacks justification whilst ‘discretion’ is a choice among a set of alternatives,
in which there is no prevalence that can be justified of one alternative over another.
42. Neil MacCormick, Rhetoric and the Rule of Law (Oxford University Press, 2005) at 16 and
Humberto Ávila, Certainty in Law (Springer, 2016) at 55-66.
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4.3. Conclusion on the Plausibility of the Conditions a) and b)
Typical rational legal systems with interpretative codes, a plurality of interpretative directives, and non-liquet rules seem to accommodate our intuitions about
how the law and courts work in a typical society.
As I have argued, premises a) and b) are plausible. In the next section, I will
provide a reason for accepting premise c). This reason consists of three parts.
I call the first part the non-redundancy clause. I call the second part the interpretative negative spaces scenario. I call the third part the obligation to decide.
5. On Premise c)
Premise c) states that if a rational legal system has an interpretative code with
more than one interpretative directive, and it contains the non-liquet rule, then
in this system legal interpretation is necessarily discretionary.
In this section, I will provide one reason to support this premise. This reason
consists of three parts. The first part focuses on the consequences of having a
legal system that is rational. The second part focuses on the lack of rules that
govern the use of the interpretative codes. The third part focuses on the interplay
between the legal obligation to decide all cases, prescribed by the non-liquet rule,
and the lack of legal rules that regulate the use of the multiplicity of interpretative
directives contained in the interpretative code.
As I will advance further in the next subsections, premise a) allows for judges
to have discretion, and premise b) allows for the legal obligation of judges to
exercise discretion.
5.1. Part One of the Reason for Accepting Premise c):
The Non-Redundancy Clause
The non-redundancy clause states that rational legal systems can have neither
redundant norm formulations nor norms. Following Ross, “[r]edundancy occurs
when a norm lays down a legal effect which in the same factual conditions is
authorized by another norm”.43
If a rational legal system has an interpretative code with more than one interpretative directive, then each interpretative directive will necessarily lead to a different interpretative result. This is because if two or more interpretative directives
lead to the same result, then they are redundant and all but one needs to be eliminated from the system. In other words, a plurality of interpretative directives
amounts to a plurality of norms ascribable ex ante to a norm formulation, thus
making typical rational legal systems indeterminate. For example, suppose that in
order to determine the evidential threshold prescribed by the legal system, judges
need to interpret the ‘beyond a reasonable doubt’ standard of proof. They will
43. Ross, supra note 11 at 132.
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turn to the interpretative code that contains three interpretative directives: the
‘plain meaning of the text’ rule, the ‘intention of the legislator’ rule, and the ‘history of the legislation’ rule. Due to the non-redundancy feature, the interpretative
codes cannot provide the same interpretative result; thus, the judge will have
three different norms (i.e., meanings) that could be ex ante ascribed to the formula
‘beyond a reasonable doubt’. In other words, the ‘plain meaning of the text’ rule
necessarily provides a different interpretative result than the ‘intention of the legislator’ rule and the ‘history of the legislation’ rule. Otherwise, these three rules
are redundant and all but one ought to be eliminated from the system.
Due to the non-redundancy clause, interpretative codes with more than one
interpretative directive will necessarily multiply norms that can, ex ante, be
ascribed to norm formulations. Thus, the interpreter can ascribe as many norms
as there are interpretative directives to a norm formulation. Instead of reducing
indeterminacy, interpretative codes will contribute to it by allowing for a multiplicity of ex ante ascribable norms to norm formulations. Thus, a norm formulation can bear, at least the same number of norms as the number of interpretative
directives contained in the interpretative code of a legal system. From the multiplicity of interpretative directives, it follows that it is impossible to determine ex
ante which norm will be chosen by the interpreter. Therefore, the non-redundancy clause supports the claim that the multiplicity of interpretative tools contributes to the multiplicity of norms, thus, making law indeterminate.
This multiplicity of ascribable norms allows for judges to have discretion
when interpreting the law. That is, the judge will need to choose which norm
from all the interpretative options will be ascribed to the norm formulation
applicable to a case. However, this is not the entire story for the discretion of
judges. Further argumentation will be provided in §5.2.
The non-redundancy clause supports the claim that the multiplicity of interpretative tools contributes to the multiplicity of norms, thus making law indeterminate.
In other words, a norm formulation can bear, at least, the same number of norms as
the number of interpretative directives contained in the interpretative code of a legal
system. From the multiplicity of interpretative directives, it follows that it is impossible to determine ex ante which norm will be chosen by the interpreter.
Now, notice that this argument does not need to rely on a specific theory of
meaning nor does it need to deny the existence of a right answer in legal interpretation. It could be the case that among the multiplicity of norms, there is one
that can be deemed as such. However, from the perspective of the legal system,
all norms equally legally valid. Those who support the ‘right answer’ thesis will
need to rely on extra-legal criteria to identify it. This argument does not imply
that from an empirical point of view, different interpretative directives cannot
yield the same result. By result, I am referring to the decision of a case. In contrast, it is possible that several interpretative directives lead to the same result and
still have a rational legal system.44 Notice that the use of only one interpretative
44. Alchourrón & Bulygin, supra note 11 at 64.
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directive is a sufficient condition for a norm to be legally valid. Thus, having the
same interpretative result in practice is inconsequential for the validity of the legal
decision and at best it could be considered a rhetorical tool to support why a
particular norm should be preferred above others.
5.2. Part Two of Reason for Accepting Premise c): The Existence of
Interpretative Negative Spaces
There are two kinds of interpretative codes. One kind of interpretative code is the
one that is regulated by legal meta-rules. Thus, it will contain legal meta-rules
that will guide and constrain the use of the interpretative directives. These
meta-rules, as far as I can see, can be of two kinds: syntactic meta-rules and
semantic meta-rules. The first group of rules prescribes hierarchies among the
interpretative directives. Thus, they guide the interpreter in the use of the interpretative code. For example, a syntactic meta-rule can be formulated as follows:
“When the wording of the law is clear the judge ought to interpret the law according to the plain meaning of the text. If the wording of the law is unclear the interpreter ought to interpret the law according to the intention of the legislator. If
interpreting the law according to the intention of the legislator produces a result
that infringes fundamental rights then the interpreter ought to interpret the law
according to the historical context in which the legislation was enacted”. This rule
prescribes an order that the judge is legally obliged to follow when interpreting
the law. The second group of rules prescribes how we are to interpret the interpretative directives. Semantic meta-rules are meta-meta rules that help to reduce the
natural language-based indeterminacy of the interpretative code. For example, a
semantic meta-rule can be formulated as follows: “When applying the plain meaning of the text rule, the judge ought to interpret the formula ‘plain meaning of the
text’ as the lexicographical meaning of the words of the law”.
The second kind of interpretative code is one that is not regulated by metarules. Since there are no legal meta-rules that guide and constrain the use of the
interpretative directives, the interpreter will have discretion when using the interpretative code.
The lack of legal-meta rules that govern the use of the interpretative code is
what I call ‘interpretative negative space’. Roughly put, in art, negative space is
the area between and around an object in an image. A negative space plays at least
three functions. First, it says something about the positive space (i.e., objects,
identifying their shape and limits). Second, it represents the absence of a positive
space. Third, it says something about the limits or boundaries of the said
absence.45 I think there is an analogous case to be made in legal reasoning. I
use the aesthetic concept of ‘negative space’ to illustrate the lack of legal
45. For literature on perception of absence see Anna Farennikova, “Seeing Absence” (2013)
166 Philosophical Studies 429 and MGF Martin, “Sight and Touch” in Fiona MacPherson,
ed, The Senses: Classical and Contemporary Philosophical Perspectives (Oxford University
Press, 2011) 201.
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meta-rules that regulate the use of the interpretative rules contained in the interpretative code (i.e., the interpretative negative space). The interpretative negative
space fulfils three functions in legal reasoning. First, it says something about
the legal rules that are used in legal reasoning (i.e., the positive spaces). Thus,
it identifies the interpretative code and the types of interpretative directives that
it contains as the rules used by judges in legal interpretation. Second, it represents
the absence of rules that regulate the use of interpretative directives (i.e., the
absence of semantic and/or syntactic meta-rules). Third, it defines the boundaries
of the absence of rules. These boundaries refer to the scope of the decision that
judges need to make regarding the use of the interpretative code. That is, the
decision about both establishing a hierarchy among interpretative directives
and the way that the interpretative directives are to be interpreted when applied.
Since there is a lack of meta-rules, this decision is discretionary. In other words,
interpretative negative spaces define the scope of discretion in legal interpretation. As I will develop further, the scope of discretion in legal interpretation
extends to the decision of which interpretative directive the judge will use and
how the selected interpretative directive will be interpreted. Thus, the advanced
analogy stresses the fact that there are negative spaces between interpretative
directives.
Due to the lack of legal meta-rules that regulate the interpretative code, all of
the different norms that can be ascribed to a norm formulation are in equal standing before the interpreter. Therefore, since there are negative spaces when interpreting the law, judges do not have legal guidance to choose which interpretative
directive they will use to ground their interpretation of a norm formulation. Due
to the existence of interpretative negative spaces and the multiplicity of interpretative directives, judges have discretion when interpreting law.
There are two conceptually possible scenarios in which interpretative negative
spaces can be found and these scenarios are mutually exclusive. One scenario is
the case in which the interpretative code lacks legal meta-rules that governs how
this code is to be used. Another scenario is that the interpretative codes have
meta-rules, either semantic or syntactic, that governs the use of interpretative
codes. It is conceptually the case that one of these two scenarios will arise.
These two scenarios will be explored in §5.2.1 and §5.2.2.
5.2.1. In the Event of No Legal Meta-Rules
It is possible that the interpretative code contains neither syntactic nor semantic
legal meta-rules. That is, there is no hierarchy among the interpretative directives
nor methods for their interpretation.
The point that I will be stressing in this section is the importance of the existence of discretion regarding the lack of syntactic legal meta-rules. From the absence of legal hierarchies, it follows that all interpretive directives are in an ‘equal
stance’ before the interpreter. As Spaak notes, “there is no agreement among
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lawyers on how to rank the interpretative [directives]”.46 Thus, the decision about
which interpretative directive will be used, and thus which norm will be ascribed
to the norm formulation, is left to choice. Lack of meta-rules allows for the use of
competing norms to decide the case at hand. This is what makes the law. That is,
it is not possible ex ante to determine what norm will decide the case because it is
not possible to predict which interpretative directive the interpreter will use insofar as there are no hierarchies among them. Notice that the lack of syntactic
legal meta-rules does not entail the absence of rules for the interpreter. It just
means that if the interpreter follows meta-rules to guide a decision about how
to use the interpretative code, then these meta-rules are not legal in origin but
something else.
Due to the multiplicity of interpretative directives and the lack of legal metarules, interpreters will necessarily find instances of discretion when interpreting
norm formulations (i.e., instances where they will need to exercise judgment).
These instances of discretion necessarily arise whenever the use of the interpretative code is needed. In other words, if a legal system has an interpretative code
with more than one interpretative directive and there are no meta-rules that regulate its use by establishing hierarchies among them, then legal interpretation
necessarily entails discretion in the form of the choice of the interpreter among
a closed set of options (i.e., the interpretative directives).
In the scenario for which there are no legal meta-rules, judges will necessarily
have discretion when interpreting the law.
5.2.2. In the Event of Legal Meta-Rules
It is possible to think about a legal system that contains an interpretative code
with both syntactic and semantic meta-rules of legal origin. However, even if this
is the case, negative spaces will necessarily arise when interpreting these legal
meta-rules. Due to the indeterminacy of natural languages, cases of ambiguity
and vagueness will eventually affect those legal meta-rules. Thus, the interpretation of legal meta-rules is left to the interpreter’s discretion. In §5.2.2.1 and
§5.2.2.2, I further develop the claim that negative spaces are necessary albeit
the existence of legal meta-rules; thus, judges will necessarily have discretion
in interpreting the law.
5.2.2.1. In the Event of Syntactic Legal Meta-Rules
What if interpretative codes do contain syntactic meta-rules? Although legal systems do not usually expressly contain these kinds of rules, it is possible to imagine a legal system that does. If the legal meta-rules are posited as norm
formulations, they will require interpretation in order to be used. It is possible
46. Spaak, supra note 10 at 57.
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as a result to foresee a situation of infinite regress in which meta-meta rules will
be required to interpret meta-rules and so on.
Arguably, the key issue about the interpretation of legal meta-rules has to do
with the decision of whether some interpretative directive is suitable for the interpretation of norm formulations in a given case. This is of central importance to
the extent that a decision about the suitability of a given interpretative directive
will have a direct impact on the norm that will decide the case in the end.47 The
decision regarding the meaning of ‘suitable’ will be left to the discretion of
the judge. Instances of discretion will move from the choosing of interpretative
directives to the interpretation of the syntactic meta-rules. In other words, interpretative negative space will arise when interpreting syntactic meta-rules, and
thus judges will—since they must decide—necessarily have discretion in interpreting the law. Once again, an absence of syntactic meta-rules does not follow
from this claim. Interpreters will probably follow certain rules or guidelines to
establish hierarchies among interpretative directives, but if that is the case, these
rules cannot be legal in origin.
5.2.2.2. In the Event of Semantic Legal Meta-Rules
What if interpretative codes do form semantic legal meta-rules?
It is possible to imagine an interpretative code that does contain meta-meta
rules of interpretation. One can claim that the origin of these interpretative directives can be judge-made or the product of the legislator. However, whatever its
origin, these meta-meta rules require interpretation in order to be used to interpret
the norm formulation that will be applied to decide a given case.
Suppose that we have chosen the intention of the legislator rule for our code.
Now we need to apply it to norm formulation “X” that is used to solve a case. The
first thing that the interpreter must do is ascribe a meaning to the interpretative
directive. What do we mean by ‘the intention of the legislator’? The interpretation
of the first-order norm formulation depends on the answer to this question.
The problem with this, prima facie, seems rather obvious: we do not have
meta-meta-interpretative legal rules (i.e., semantic meta-meta rules), and proposing the addition of more rules to the system would amount to an infinite regress.48
It follows that when interpreting interpretative directives, legal operators will
eventually find interpretative negative spaces. Thus, the decision about how
we are to interpret these meta-rules is discretionary. We are in the same situation
as in §5.2.2.1: discretion is moved one level up. That is, indeterminacy will affect
the semantic-meta rule, making it impossible to know ex ante how this rule is to
47. As the reader might have noticed, the issue described above has to do with the indeterminacy of
natural language. This further supports the main point of this essay that law is affected by at
least two kinds of conceptual indeterminacy: 1) the indeterminacy of natural language; and 2)
the ‘systemic’ indeterminacy accounted for in this paper.
48. For an example of adding rules to the system in order to deal with issues of indeterminacy, see
Sebastián Reyes Molina, “On Legal Interpretation and Second-order Proof Rules” (2017)
Analisi e Diritto at 179.
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be interpreted. Since how we are to understand the interpretative guideline will
depend on how the semantic meta-rule will be interpreted, the indeterminacy of
the latter will affect the interpretation of the former.
As Waldron notes,
[s]ince words do not apply themselves, since it is we who apply them to cases, of
course we may need further rules for their application, and of course we will eventually run out of analytic meaning-rules before a precise application is determined.
There cannot be a rule to tell us how to apply every rule: sooner or later one simply
makes a judgment.49
Following Waldron, at some point the interpreter needs to make a judgment. In
other words, interpretative negative space will arise when interpreting semantic
meta-rules, and thus judges will necessarily have discretion when interpreting
the law.
5.3. Part Three of Reason for Accepting Premise c): The Obligation
to Decide
From §5.1 and §5.2, it is possible to conclude that there is a multiplicity of interpretative results and an absence of legal rules that guide and constrain the interpreter as to how to choose one among the many interpretative results. However,
one additional step is required in order to make the case that discretion is a necessary feature in legal interpretation. This further step has to do with prescribing
a legal obligation that judges have to decide a case. As I have covered in §4.2, a
typical rational legal system contains the non-liquet rule. This rule prescribes the
obligation to decide all cases. This obligation is applicable even when there are
no legal rules that govern the case at hand. Its scope encompasses both the final
decision of the case, as well as all the other decisions that judges need to make
throughout the legal process. One of these decisions is the one regarding which
interpretative tool the norm that will decide the case will be grounded.
As stated in §4, whenever the interpretation of a norm formulation is required,
the interpretative result ought to be grounded in an interpretative directive.
Although there are interpretative negative spaces regarding how to use the interpretative code, the non-liquet rule demands a decision that will settle this specific
matter regardless. Due to the existence of these interpretative negative spaces, the
decision about the interpretative directive necessarily amounts to a choice over
which interpretative tool will be selected. In other words, discretion is a necessary
feature in legal interpretation.
Due to the obligation to decide, judges must necessarily exercise discretion in
legal interpretation.
49. Jeremy Waldron, “Vagueness in Law and Language: Some Philosophical Issues” (1994) 82:3
Cal L Rev at 511.
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Judicial Discretion as a Result of Systemic Indeterminacy
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5.4. Identifying Discretion in Legal Decision-Making
The existence of interpretative negative spaces allows for a moderate account of
discretion in legal interpretation. By moderate account, I mean that interpreters
will exercise their discretion, in the form of judgment, whenever they choose both
the interpretative directive and its interpretation. In other words, discretion can be
reduced to a choice about which interpretive directive will ground the norm that
will be applied in a given case.
Two comments are in order. First, discretion does not pervade the entire process of legal decision-making, this is not what I am claiming. It is only limited to
the decision about the interpretative directives. Second, discretion is not merely
the result of certain features of natural language which would figure prominently
with a ‘plain meaning’ rule.
Although interpretative codes are thought to help reduce ambiguity and
vagueness, they would explain the presence of a plurality of norms, thus contributing to the indeterminacy of law. Notice, however, that this plurality of different
norms is not the result of certain features of natural languages that affect the law.
Although ambiguity and vagueness play a role in legal interpretation, the picture
of legal indeterminacy is complete when it is understood in combination with the
notion of a rational legal system. Since legal systems cannot have redundant legal
rules, each interpretative code will yield a different norm. Thus, legal interpretation necessarily involves a choice. This choice is about which norm the judge will
apply to decide the case. In other words, discretion is a necessary feature in legal
interpretation.
6. Conclusion
Unlike the prevailing account of legal indeterminacy laid down in §3, I do not
think that indeterminacy and discretion in law are explained mostly by certain
features of natural language or by extra-legal factors that might operate in legal
adjudication. In this paper, I have advanced a thesis that bases legal indeterminacy and judicial discretion on features within the structure of typical rational
legal systems. My argument states that under certain premises, there are specific
features of legal systems that allow for a conceptual kind of both legal indeterminacy and discretion in legal adjudication.
In §4, I defended the premises a) and b) of my arguments. These premises are
sound and accommodate our intuitions about how typical rational legal systems
are structured. These conditions are plausible in the sense that they will commonly be found in existing typical legal systems.
In §5, I provided a three-part reason that supports premise c). The first part, the
non-redundancy clause, states that rational legal systems do not have redundant
norms. This means that in the case of legal interpretation, interpretative codes
with multiple interpretative directives will necessarily yield multiple norms that
an interpreter can ascribe to a norm formulation. Each norm necessarily provides
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a different solution for a given case, otherwise they are redundant and all but one
ought to be eliminated from the legal system.
The second part, the existence of interpretative negative spaces, stresses the
fact that interpretative directives are typically not ranked by other meta-rules from
a legal origin. It follows then that all of the interpretative directives are on an
equal footing and each necessarily provide a different norm for a specific norm
formulation. These interpretative negative spaces will necessarily arise and they
can be found in two scenarios. The first scenario refers to an interpretative code
that lacks legal meta-rules for its use. The second scenario refers to the existence
of legal meta-rules that governs how to use the interpretative code. As I have
shown in both scenarios, judges will necessarily have discretion when interpreting the law. The third part, the obligation to decide, establishes that interpreters
need to make a decision on how to use the interpretative code despite the existence of interpretative negative spaces. The judges’ situation is as follows: there
are many interpretative directives, each one providing necessarily a different result; judges need to choose one in order to ground an interpretation of the norm
formulation; there are no meta-rules to help them decide which directive they will
use and they are bound to do so regardless of the existence of interpretative negative spaces due to the non-liquet rule. Thus, judicial discretion is the result of the
combination of an interpretative code with a multiplicity of interpretative directives, the non-redundancy clause, the existence of interpretative spaces, and the
non-liquet rule. This is the core of premise c). In other words, judges necessarily
exercise discretion. Notice, however, that it does not follow that there are no rules
at all, but if the interpreter uses rules to guide a decision, such rules are not legal
in origin but something else.
The decision about how to use the interpretative code amounts to a choice.
A judgment made by the interpreter decides two things. First, which interpretative directive one will use. Second, how the interpretative directive will be interpreted. Discretion is limited to certain instances where interpretative negative
spaces can be found. These instances have a direct impact on the way in
which the norm formulation is interpreted. Notice that these negative spaces
are conceptual in nature, thus yielding discretion as a necessary element in legal
interpretation.
Some prima facie consequences of this approach are as follows: first, as stated
throughout the text, law is necessarily indeterminate. What is indeterminate is
which interpretative directive the judge will use. Bear in mind that each interpretative directive provides a different interpretative result. It follows that it is not
possible ex ante to determine which norm will be ascribed to the norm formulation. This means that it is indeterminate which norm will be applied to the case.
Second, legal adjudication is necessarily discretionary, since the interpreter is
under an obligation to select one among many interpretative directives that
are on equal grounds without any rule that offers guidance. Thus, the decision
about which interpretative directive will be used is necessarily discretionary.
Third, neither indeterminacy nor discretion is solely the product of law understood as a manifestation of natural language. They are also a product of how
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Judicial Discretion as a Result of Systemic Indeterminacy
395
a legal system is designed. That is, which type of formal properties we ascribe to
them and how we regulate the use of interpretative codes. Fourth, I do not claim
that indeterminacy is radical and we are in an ‘anything goes’ type of situation.
There is a plurality of norms that can be ascribed to a single norm formulation,
but this plurality is a finite number. That is, there are as many norms for any
single norm formulation as the number of interpretative directives contained
in an interpretative code. Fifth, I do not claim that discretion pervades the entire
adjudication process or that the interpreter can make whatever judgment they
desire. Discretion, in my account, is limited only to the choice among the interpretative directives contained in the interpretative code.
Lastly, two practical concerns are raised by this paper. First, if a given society
deems discretion to be problematic, the fact that it is a necessary element of
adjudication then prevents the solving of this problem through more legal rules.
The multiplication of legal rules will inevitably lead to an infinite regress and just
‘move’ the problem of indeterminacy and discretion to a higher level. Second, if
discretion is a necessary feature of legal interpretation, then studying extralegal factors (i.e., biases, political allegiances, moral convictions, the overall
set of stimuli, etc.) could be an advisable strategy to reduce indeterminacy in law.
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