My reasoning has been to consider scenario 1 from the perspective of an outside observer, who is uncertain about each variable: a) whether it is Monday or Tuesday, b) how the coin came up, c) what happened to Beauty on that day.
To that observer, “Tuesday and heads” is definitely a possibility, and it doesn’t really matter how we label the third variable: “woken”, “interviewed”, whatever. If the experiment has ended, then that’s a day where she hasn’t been interviewed.
If the outside observer learns that Beauty hasn’t been interviewed today, then they may conclude that it’s Tuesday and that the coin came up heads, thus a) they have something to update on and b) that observer must assign probability mass to “Tuesday & Heads & not interviewed”.
If the outside observer learns that Beauty has been interviewed, it seems to me that they would infer that it’s more likely, given their prior state of knowledge, that the coin came up heads.
To the outside observer, scenario 2 isn’t really distinct from scenario 1. The difference only makes a difference to Beauty herself.
However, I see no reason to treat Beauty herself differently than an outside observer, including the possibility of updating on being interviewed or on not being interviewed.
So, if my probability tables are correct for an outside observer, I’m pretty sure they’re correct for Beauty.
(My confidence in the table themselves, however, has been eroded a little by my not being able to calculate Beauty—or an observer—updating on a new piece of information in the “fuzzy” variant, e.g. using P(heads|woken) as a prior probability and updating on learning that it is in fact Tuesday. It seems to me that for the math to check out requires that this operation should recover the “absent-minded experimenter” probability for “tuesday & heads & woken”. But I’m having a busy week so far and haven’t had much time to think about it.)
My reasoning has been to consider scenario 1 from the perspective of an outside observer, who is uncertain about each variable: a) whether it is Monday or Tuesday, b) how the coin came up, c) what happened to Beauty on that day.
To that observer, “Tuesday and heads” is definitely a possibility, and it doesn’t really matter how we label the third variable: “woken”, “interviewed”, whatever. If the experiment has ended, then that’s a day where she hasn’t been interviewed.
If the outside observer learns that Beauty hasn’t been interviewed today, then they may conclude that it’s Tuesday and that the coin came up heads, thus a) they have something to update on and b) that observer must assign probability mass to “Tuesday & Heads & not interviewed”.
If the outside observer learns that Beauty has been interviewed, it seems to me that they would infer that it’s more likely, given their prior state of knowledge, that the coin came up heads.
To the outside observer, scenario 2 isn’t really distinct from scenario 1. The difference only makes a difference to Beauty herself.
However, I see no reason to treat Beauty herself differently than an outside observer, including the possibility of updating on being interviewed or on not being interviewed.
So, if my probability tables are correct for an outside observer, I’m pretty sure they’re correct for Beauty.
(My confidence in the table themselves, however, has been eroded a little by my not being able to calculate Beauty—or an observer—updating on a new piece of information in the “fuzzy” variant, e.g. using P(heads|woken) as a prior probability and updating on learning that it is in fact Tuesday. It seems to me that for the math to check out requires that this operation should recover the “absent-minded experimenter” probability for “tuesday & heads & woken”. But I’m having a busy week so far and haven’t had much time to think about it.)