orthonormal comments on Robust Cooperation in the Prisoner's Dilemma - Less Wrong

69 Post author: orthonormal 07 June 2013 08:30AM

You are viewing a comment permalink. View the original post to see all comments and the full post content.

Comments (145)

You are viewing a single comment's thread. Show more comments above.

Comment author: Karl 10 July 2013 10:08:21PM *  2 points [-]

Here is another obstacle to an optimality result: define UnfairBot as the agent which cooperate with X if and only if PA prove that X defect against UnfairBot, then no modal agent can get both FairBot and UnfairBot to cooperate with it.

Comment author: orthonormal 15 July 2013 05:22:33AM 2 points [-]

Right! More generally, I claim that if a modal agent provably cooperates (in PA) against some other agent, then it cannot provably defect (in PA) against any other agent: roughly speaking, PA can never prove that any proof search in PA or higher fails, so a modal agent can only provably (in PA) do the action that it would do if PA were inconsistent.