Sarah Perry is a contributing editor of Ribbonfarm.
“Ironically, once ignorance is defined, it loses its very definition.”
—Linsey McGoey, “The Logic of Strategic Ignorance”
In game theory, rational parties try to maximize their expected payoff, assuming that the other parties are rational, too. Rationality can be a handicap, though: a rational party is limited in the threats it can make compared to an irrational party, because a rational party can’t credibly threaten to harm its own interests. An irrational party may be harder to cooperate with and less likely to be chosen as a cooperation partner, but in certain situations, it has more powerful strategies open to it than a party limited by rational maximization of expected value. An irrational party is not to be messed with, and can often demand concessions that would not be given to a rational party. Evolutionary psychologists, for instance, posit that altruistic punishment is an adaptation that fits in this slot – giving people sufficient irrational motivation to harm their own interests for the sake of promoting fairness norms. Rationality is good, but a little strategic irrationality is better – especially in the service of promoting cooperation. [Read more…]