There is literally zero sense in which those, those different copies of you, constitute a coherent physical system. They are separate, non interacting things. It's not like there are many copies of you and one of them is the real you. That's the right way to think about it. So to go back to peter's question, well, what about these philosophers who say that personhood is the primary and only unquestionable knowledgei have? They're wrong. I me onothing as any unquestionable knowledge that you have. But i certainly don't think that it' certainly not primary when you consider the relationship of personhood to fundamental physics.

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