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Payoff matrix

For the Prisoners dilemma

Cooperate Defect
Cooperate 6 months, 6 months no time, 10 years
Defect 10 years, no time 5 years, 5 years
Here, the payoff is like a golf score--lower is better

For Chicken

Cooperate Defect
Cooperate +5, +5 +1, +10
Defect +10, +1 -20, -20
Here, the higher the payoff, the better.

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