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. 2022 Sep 16;13(6):e1622. doi: 10.1002/wcs.1622

FIGURE 1.

FIGURE 1

(a) The Prisoner's dilemma game. A typical payoff matrix is shown for Player A; values should satisfy the relationship T > R > P > S and R > (S + T)/2. From Axelrod and Hamilton (1981). (b) Cooperate–cooperate move averages, by generation, for 100 trials. From Hourigan and Eck (2004)