Tit for Tat

The Prisoner’s Dilemma: a summary, and new advances:

merely playing the game repeatedly with the same people is enough to favour strategies that resemble decent human behaviour

 

a purely self-interested player, who will modify his play only to increase his own score, can be taken for a ride by an “extortionist” who is able to use the other player’s self-interest against him.

 

(Via Hacker News)

Encouraging stuff!

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