Everything we know of neuroscience suggests that in the gradual-replacement scenario, you wouldn’t even notice small enough alterations, and the brain is amazingly adaptable. Your hybrid brain would retain all the same patterns of information that define you. So there’s no reason to think that your subjective consciousness would be compromised, and you would of course remain you—there is no one else to call you. However, at the end of this hypothetical process, the final you is exactly like You 2 in the first experiment, which we decided was not you. How can this be reconciled? The difference
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