Vladimir_Nesov comments on Torture vs. Dust vs. the Presumptuous Philosopher: Anthropic Reasoning in UDT - Less Wrong

16 Post author: Wei_Dai 03 September 2009 11:04PM

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Comment author: AnnaSalamon 04 September 2009 10:59:47PM 2 points [-]

in mathematically possible structures other than the world it is "actually in"

The Counterfactual Mugging previously discussed involved probabilities over mathematical facts, e.g. the value, in binary, of the nth digit of pi. If that digit does turn out to be a 0, the counterfactual mugging pays off only in a mathematically impossible structures.

Comment author: Vladimir_Nesov 05 September 2009 07:37:16AM 5 points [-]

Which seems to be no more impossible than normal counterfactuals, just more explicitly so.