@grimalkina @deborahh @mrtnsnp @Pepijn but this prisoner can solve his dilemma by sharing information. Which was not prohibited by the rules as described, and that's the question here: were the experiment subjects noncooperative, or was the experimenter unethically not disclosing (after the fact) the actual experiment, or was the experiment poorly designed?
Or did the notional experimenter lie just to give the subjects some drinking money?