I’d say “an order of magnitude is a rough estimate” is a rough estimate. Remember, this is epistemic probability, so whether you
just think 76297 looks prime-ish and guess 9⁄10
mentally estimate the natural logarithm, quickly check whether 76297 is divisible by 2 or 3, and call it a 1⁄2 chance
can actually compute the Sieve of Eratosthenes with five nines of accuracy for it in ten seconds and call it a 1/10000 chance
You’re correct, as long as you’re not mis-reading your own degree of belief. To get into confidence about your degree of belief, I think we’d have to get into something like informal Dempster-Schafer theory—which, incidentally, I’d love to do.
I’d say “an order of magnitude is a rough estimate” is a rough estimate. Remember, this is epistemic probability, so whether you
just think 76297 looks prime-ish and guess 9⁄10
mentally estimate the natural logarithm, quickly check whether 76297 is divisible by 2 or 3, and call it a 1⁄2 chance
can actually compute the Sieve of Eratosthenes with five nines of accuracy for it in ten seconds and call it a 1/10000 chance
You’re correct, as long as you’re not mis-reading your own degree of belief. To get into confidence about your degree of belief, I think we’d have to get into something like informal Dempster-Schafer theory—which, incidentally, I’d love to do.