The philosophers Liam Clegg and Daniel Dennett have argued that human behavior is inherently unpredictable not just because of random neural noise in the brain but as an adaptation that makes it harder for our rivals to outguess us.4 A Non-Zero-Sum Game: The Volunteer’s Dilemma Rational actors can end up in outguessing standoffs not just in games that pit them in zero-sum competition but in ones that partly align them with common interests.

