What do you mean 'priors from nowhere'? The idea that we're just born with a prior, or people just saying 'this is my prior, and therefore a fact' when given some random situation (that was me paraphrasing my mum's 'this is my opinion, and therefore a fact').
More like "here are the priors I'm plugging into the bright and shiny Bayes equation", without any indication of why the priors were plausible enough to be worth bothering with.
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.