But the whole point of the original post was that you had logical uncertainty. That's why in Bayesian reasoning you can't have probabilites of 0 and 1 - to allow for the possibility, however small, of updating.
See also: How to convince me that 2+2 =3
Thanks, I don't really understand where I was coming from before. Maybe my new found understanding of the terminology around uncertainty has finally updated my intuitions :)
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