That presupposes that P(Bob came back) is not affected by your decision to send the information further on.
No. I gave an example in which it was not decided to send information back. It’s simply impossible to go back in time without proving that you weren’t killed by a time-travelling assassin.
No. I gave an example in which it was not decided to send information back. It’s simply impossible to go back in time without proving that you weren’t killed by a time-travelling assassin.