cousin_it comments on The limited predictor problem - Less Wrong

10 Post author: cousin_it 21 March 2012 12:15AM

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Comment author: cousin_it 21 March 2012 11:56:52AM *  0 points [-]

Thanks for the compliment ;-) but I still don't completely understand your comment. If you mean the version of A that doesn't refer to runtime(A) explicitly, what's the short proof of the second statement?

Comment author: gRR 21 March 2012 12:27:16PM 0 points [-]

"if A()=a and runtime(A)<N then U()=u" can only be proved by an agent that represents runtime() explicitly, which means it would probably find (relatively short) general proofs of the form (max proof length)<L => runtime < some function of L,
and
agent proves X => length of proof of X < max proof length.

Although, now that I think of it more, this does not help, as in this setting the agent may easily prove X but not "agent proves X"... You're right, the proof of the second statement is not obviously short.