This is perhaps not the best description of actualism, but I see your point. Actualists would disagree with this part of my comment:
If I believed that “you will win” (no probability qualifier), then in the many universes where you didn’t I’m in Bayes Hell.
on the grounds that those other universes don’t exist.
But that was just a figure of speech. I don’t actually need those other universes to argue against 0 and 1 as probabilities. And if Frequentists disbelieve in that, there’s no place in Bayes Heaven for them.
This is perhaps not the best description of actualism, but I see your point. Actualists would disagree with this part of my comment:
on the grounds that those other universes don’t exist.
But that was just a figure of speech. I don’t actually need those other universes to argue against 0 and 1 as probabilities. And if Frequentists disbelieve in that, there’s no place in Bayes Heaven for them.