Let's suppose that there are infinite level 1 universes, agreeing with physicist like Max Tegmark and even before them with philosophers like Giordano Bruno.

Now, please follow this thought experiment: I'm in the universe #1 (U1), I'm ten years old and unfortunately I die in a car accident. The Universe 2 (U2) is almost identical to the first one, but here I escaped the accident at the last minute. At the age of thirty, however, I die of a sudden fall. In U3 I avoid the fall and survive, only to die at fifty for poisoning, from which I recover in U4, to die ten years later for an heart attack, from which I recover in U5, to have a fatal tumor after another ten, from which I recover in U6 ...

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If there are infinite universes, do very old people have to remember many mortal risks, more and more frequent with age? In some other very rare universes, are there very old people, almost immortal?

Moreover, if we believe that we are the same person even after a long deep sleep, a coma or an hibernation, the continuity of our consciousness should therefore last a few centuries? The case described above implicate differences in components (body) and place, so it's not qualitatively different from a case where I fall asleep for some years and someone move me to a colony in Mars and wake me up: the body components changed and the place as well. Similar issues are raised by the teletransportation paradox.

PS: Note that I'm not speaking of Quantum immortality, that requires a level III multiverse

Someone wants to close this topic as OT, but in the Physics SE told me to come here, and I think they are right, this is philosophy of science.

put on hold as off-topic by virmaior, Nick R, Conifold, Eliran, Mark Andrews 5 hours ago

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  • There might not exist a universe where you can escape something particular. Just how can't light emitted by a star one lightyear away reach us in less than one year. So, "almost immortal" would be impossible with current bodies without technology advances anyway. – rus9384 Dec 6 at 11:39
  • @rus9384 I agree, 'almost immortal' is a bit an exaggeration could be impossible. But a very long age should be very likely. – Francesco D'Isa Dec 6 at 11:42
  • "do very old people have to remember many mortal risks" -- not from your perspective. From your perspective, they would have succumbed to those risks long before you'd notice anything out of the ordinary. But from your perspective, your risks and close calls would pile up until your survival seems absurd to you. – EternalPropagation Dec 6 at 14:17
  • @EternalPropagation yes, it was what I meant :) – Francesco D'Isa Dec 6 at 15:37
  • If there is no randomness in the world: the state X follows the state Y. Even if there are two universes with state X, both will have state Y someafter. So, your idea is wrong without randomness/quantumness. – rus9384 Dec 6 at 16:49