RichardKennaway comments on Say More, Justify Less - Less Wrong

19 Post author: paulfchristiano 14 April 2011 10:41PM

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Comment author: RichardKennaway 15 April 2011 01:33:49PM 0 points [-]

I forgot the other requirement, and the more onerous one, for Aumann agreement: the two people's priors must already agree. This is absolutely unrealistic.

Strong Bayesians may say that there is a unique universal prior that every perfect Bayesian reasoner must have, but until that prior can be exhibited, Aumann agreement must remain a mirage. No-one has exhibited that prior.