I think that could only work if you had 2 causal universes (either 2 Hubble volumes or 2 separate universes) exactly equal to each other. Only then could you have 2 persons exactly equal, having the exact same chain of experiences. But we never observe 2 complex macroscopic systems that are exactly equal to the microscopic level. The universe is too complex and chaotic for that. So, the bigger the system, the less likely to happen it becomes. Unless our universe was infinite, which seems impossible since it has been born and it will die. But maybe an infinite amount of universes including many copies of each other? Seems impossible for the same reason (universes end up dying).
(And then, even if you have 2 (or even a billion) exactly equal persons experiencing the exact same chain of experiences in exactly equal causal worlds, we can see that the causal effect is the exact same in all of them, so if one dies, all the others will die too.)
Now, in MWI it could never work, since we know that the “mes” in all different branches are experiencing different things (if each branch corresponds to a different possibility, then the mes in each branch necessarily have to be experiencing different things).
Anyway, even before all of this, I don’t believe in any kind of computationalism, because information by itself has no experience. The number 7 has no experience. Consciousness must be something more complex. Information seems to be an interpretation of the physical world by a consciousness entity.
I think that could only work if you had 2 causal universes (either 2 Hubble volumes or 2 separate universes) exactly equal to each other. Only then could you have 2 persons exactly equal, having the exact same chain of experiences. But we never observe 2 complex macroscopic systems that are exactly equal to the microscopic level. The universe is too complex and chaotic for that. So, the bigger the system, the less likely to happen it becomes. Unless our universe was infinite, which seems impossible since it has been born and it will die. But maybe an infinite amount of universes including many copies of each other? Seems impossible for the same reason (universes end up dying).
(And then, even if you have 2 (or even a billion) exactly equal persons experiencing the exact same chain of experiences in exactly equal causal worlds, we can see that the causal effect is the exact same in all of them, so if one dies, all the others will die too.)
Now, in MWI it could never work, since we know that the “mes” in all different branches are experiencing different things (if each branch corresponds to a different possibility, then the mes in each branch necessarily have to be experiencing different things).
Anyway, even before all of this, I don’t believe in any kind of computationalism, because information by itself has no experience. The number 7 has no experience. Consciousness must be something more complex. Information seems to be an interpretation of the physical world by a consciousness entity.