prisoner's dilemma
cooperate or defect?
Two prisoners can cooperate (stay silent) or defect (betray). Mutual cooperation pays 3 each. Mutual defection pays 1 each. Betraying a cooperator pays 5, while the cooperator gets 0.
CC → 3,3 CD → 0,5 DC → 5,0 DD → 1,1
In a single game, defection dominates. But iterated over hundreds of rounds with noise, cooperation can emerge and thrive. Select strategies below and run a round-robin tournament.
references
Axelrod. "The Evolution of Cooperation." Basic Books, 1984.
Press & Dyson. "Iterated Prisoner's Dilemma contains strategies that dominate any evolutionary opponent." PNAS, 2012.
interactive