Researchers show that an iron bar is capable of decision-making by Lisa Zyga , Phys.org In tug-of-war dynamics, an iron bar can decide which slot machine has the higher winning probability by moving to the left for each rewarded play and to the right for each non-rewarded play of Machine A. The bar’s movements are caused by physical fluctuations. Credit: Kim, et al. (Phys.org)—Decision-making—the