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Philosophy

Personal Identity Over Time

Quick fact

The 'Ship of Theseus' paradox—if you replace every plank of a ship, is it still the same ship?—is over 2,000 years old and directly mirrors the puzzle of personal identity.

Why this is interesting

You’ve changed every cell in your body since childhood, yet you still feel like the same person. What—if anything—makes you ‘you’ across time?