The cosmologically interesting theories that have multiple versions of you out there are relevant to this discussion, because they are statistical in nature, rather than probability splitting in nature.
Imagine there is another "you". He lives on a planet that is exactly like yours, sees a sky exactly like you see when you look up. When I say "exactly", I mean down to the quantum states of every particle of his being, his planet, and his sky - even the states of all the particles in all the stars he can see.
The branching many-worlds you is different from you in at least one quantum number, somewhere in his body. This person isn't. And, if the Universe is large enough, or the ensemble of Universes is large enough, he's statistically guaranteed to exist. The larger the Universe/ensemble is, the more of you there will be.
Everyone's a special snowflake, but if you really have enough snowflakes, they won't be unique any more...
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The cosmologically interesting theories that have multiple versions of you out there are relevant to this discussion, because they are statistical in nature, rather than probability splitting in nature.
Imagine there is another "you". He lives on a planet that is exactly like yours, sees a sky exactly like you see when you look up. When I say "exactly", I mean down to the quantum states of every particle of his being, his planet, and his sky - even the states of all the particles in all the stars he can see.
The branching many-worlds you is different from you in at least one quantum number, somewhere in his body. This person isn't. And, if the Universe is large enough, or the ensemble of Universes is large enough, he's statistically guaranteed to exist. The larger the Universe/ensemble is, the more of you there will be.
Everyone's a special snowflake, but if you really have enough snowflakes, they won't be unique any more...