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Eugine_Nier comments on Knowing About Biases Can Hurt People - Less Wrong

71 Post author: Eliezer_Yudkowsky 04 April 2007 06:01PM

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Comment author: Eugine_Nier 16 September 2012 06:53:57PM 1 point [-]

And, I notice, it has only gone as far as the computers allow. "True Bayesians" also have universal priors, that assign non-zero probability density to every logically possible hypothesis. Real Bayesian statisticians never do this; all those I have read deny that it is possible.

It is impossible, even in principal. The only way to have universal priors over all computable universes is if you have access to a source of hypercomputation, but that would mean the universe isn't computable so the truth still isn't in your prior set.

Comment author: RichardKennaway 16 September 2012 06:56:24PM 0 points [-]

Is that written up as a theorem anywhere?

Comment author: Eugine_Nier 18 September 2012 12:50:51AM 0 points [-]

That depends on how one wants to formalize it.