Oh, I should have been more explicit: I think there’s a big logical leap between steps 3 and 4 of the rewritten argument, as indicated by the ellipsis. (Why is our models of reality referring to arbitrarily long-lived versions of each person a reason to act as if I will never die?) It’s far from clear that this gap can be bridged. That’s why I said the argument evaporates.
I either don’t understand your re-write or don’t understand how it dissolves the argument.
Oh, I should have been more explicit: I think there’s a big logical leap between steps 3 and 4 of the rewritten argument, as indicated by the ellipsis. (Why is our models of reality referring to arbitrarily long-lived versions of each person a reason to act as if I will never die?) It’s far from clear that this gap can be bridged. That’s why I said the argument evaporates.