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There's so many variants of prisoner's dilemma at this point which have their own winner I give up tracking. I've heard the most "realistic" one have titfortat as winner, but I've also heard that in certain population mixture, the one who defect more wins.

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Sure, it's a bit of an absurdity eventually, but when we talk about what we're actually trying to talk about with prisoner's dilemma, which is interpersonal and intergroup interaction, publicly announcing intent to collaborate and then consistently following through on that promise, seems to yield the most desirable results.

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