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timtyler comments on Metaphilosophical Mysteries - Less Wrong
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"Determined" in the sense of "weakly influenced". The more actual data you get, the weaker the influence of the original prior becomes - and after looking at the world for a little while, your original priors become insignificant - swamped under a huge mountain of sensory data about the actual observed universe.
Priors don't really affect what things you can consider - since you can consider (and assign non-zero probability to) receiving any sensory input sequence.
I use the word "prior" in the sense of priors as mathematical objects, meaning all of your starting information plus the way you learn from experience.
I can't quite place "you need a notion of event, and that is determined by your prior", but I guess the mapping between sample space and possible observations is what you meant.
Well yes, you can have "priors" that you have learned from experience. An uncomputable world is not a problem in that case either - since you can learn about uncomputable physics, in just the same way that you learn about everything else.
This whole discussion seems to be a case of people making a problem out of nothing.