Jiro comments on Causal decision theory is unsatisfactory - LessWrong

20 Post author: So8res 13 September 2014 05:05PM

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Comment author: shminux 13 September 2014 09:55:43PM 3 points [-]

If I'm the type of person who will always cooperate, what would happen if I went off-the-equilibrium-path and did defect even if my defecting is a zero probability event?

I'm trying to understand the difference between your statement and "1 is not equal 2, but what if it were?" and failing.

Comment author: Jiro 13 September 2014 11:13:00PM 1 point [-]

One possible interpretation of "if I always cooperate, what would happen if I don't" is "what is the limit, as X approaches 1, of 'if I cooperate with probability X, what would happen if I don't'?"

This doesn't reasonably map onto the 1=2 example.

Comment author: shminux 13 September 2014 11:49:26PM 1 point [-]

Right. There seems to be a discontinuity, as the limit of CDT (p->0) is not CDT (p=0). I wonder if this is the root of the issue.