=e r(2 − r 2)e r(2 − r 1) (4) An equal distribution, e1 = e2, is 5 The Prisoner’s Dilemma and the coevolution of descriptive and predictive dispositionsJeffrey A. BarrettI cannot cheat on you after we talk Cristina Bicchieri and Alessandro SontuosoPrisoner’s Dilemma cannot be a Newcomb Problem Jose´ Luis Bermu´dezCounterfactuals and the Prisoner’s Dilemma Giacomo BonannoUsing inequality (2), we show in the Supplementary Information that endow-ments need to be distributed as.