dlthomas comments on I Stand by the Sequences - Less Wrong

14 Post author: Grognor 15 May 2012 10:21AM

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Comment author: dlthomas 15 May 2012 09:43:56PM 2 points [-]

Not all formalizations that give the same observed predictions have the same Kolmogorov complexity[.]

Is that true? I thought Kolmogorov complexity was "the length of the shortest program that produces the observations" - how can that not be a one place function of the observations?

Comment author: JoshuaZ 15 May 2012 11:25:56PM 1 point [-]

Yes. In so far as the output is larger than the set of observations. Take MWI for example- the output includes all the parts of the wavebranch that we can't see. In contrast, Copenhagen only has outputs that we by and large do see. So the key issue here is that outputs and observable outputs aren't the same thing.

Comment author: dlthomas 16 May 2012 12:43:52AM 1 point [-]

Ah, fair. So in this case, we are imagining a sequence of additional observations (from a privileged position we cannot occupy) to explain.