On Reasons and Persons (1984), ch. 10-13. What makes a person persist over time?
After using various sci-fi examples to test the Lockean (personhood=psychological continuity), physicalist (same brain=same person), and Cartesian (same soul=same person) theories, Parfit concludes that the whole notion is incoherent and isn’t actually what we care about when wondering “will I die?”
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