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hairyfigment comments on New Philosophical Work on Solomonoff Induction - Less Wrong Discussion
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How is it that Solomonoff Induction, and by extension Occam's Razor, is justified in the first place? Why is it that hypotheses with higher Kolmogorov complexity are less likely to be true than those with lower Kolmogorov complexity? If it is justified by that fact that it has "worked" in the past, does that not require Solomonoff induction to justify that has worked, in the sense that you need to verify that your memories are true, and thus requires circular reasoning?
See: You only need faith in two things and the comment on the binomial monkey prior (a theory which says that the 'past' does not predict the 'future').
You could argue that there exists a more fundamental assumption, hidden in the supposed rules of probability, about the validity of the evidence you're updating on. Here I can only reply that we're trying to explain the data regardless of whether or not it "is true," and point to the fact that you're clearly willing to act like this endeavor has value.