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Thanks, I was thinking of the latter more (human irrationality), but found your first part still interesting. I understand irrationality was studied in psychology and economics, and I was wondering on the modeling of irrationality particularly, for 1-2 players, but also for a group of agents. For example, there are arguments saying for a group of irrational agents, the group choice could be rational depending on group structure etc. On individual irrationality and continued group irrationality, I think we would need to estimate the level of (and prevalence of ) irrationality in some way that captures unconscious preferences, or incomplete information. How to best combine these? Maybe it would just be just more data driven.