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HonoreDB comments on Probability puzzle: Coins in envelopes - Less Wrong Discussion
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Comments (18)
That's why I expected to "get" fewer people on LW than on xkcd. One welcome surprise was that it seems to have served as an intuition pump for one person over there, who had, only a few days earlier, written
This same person initially responded that the problem was impossible, but then was enlightened:
I'm having trouble understanding how you (and buybuydandavis) see this puzzle as illustrating (or evidencing?) a subjective approach to probability. Wouldn't it be perfectly solvable in the frequency/propensity approaches in just the same way? Conditional probability and the Bayes rule work the same way everywhere.
(I haven't read Jaynes yet) (Also enjoyed working out your puzzle, and reposted it in my blog, hope you don't mind)
Certainly don't mind. It's certainly solvable with a propensity approach, it's just that the problem description points you toward the wrong kind of propensity: there really is an absolute proportion of coins to envelopes that has strictly decreased, but that's not the relevant value.