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ReevesAnd comments on Open Thread, Apr. 27 - May 3, 2015 - Less Wrong Discussion

3 Post author: Gondolinian 27 April 2015 12:18AM

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Comment author: ReevesAnd 29 April 2015 07:19:16PM 2 points [-]

[Tit for Tat is] one of the few Memory-1 strategies that gracefully falls back to the appropriate Memory-0 strategy when faced with All-C or All-D.

I am not clear on how this is the case. It seems to me that the appropriate strategy when faced with any Memory-0 strategy is to go All-D, since your defections would optimize your own score while having no influence on the future behavior of your opponent. Tit for Tat does not default to All-D unless the opponent is All-D.

Comment author: DataPacRat 30 April 2015 08:11:36PM 0 points [-]

All-D is the /optimal/ strategy for Memory-0 - but if your goal for Memory-0 interactions is merely to avoid getting the Sucker's payoff, and /also/ to be able to deal with Memory-1 strategies, then defaulting to All-C versus All-C isn't that bad a compromise.

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