Philosophy
Personal Identity and the Psychological Continuity Theory
Quick fact
The psychological continuity theory, inspired by John Locke, argues that you are the same person as your past self because you can remember your past experiences and your mental life is continuously connected to theirs—not because you have the same body.
Why this is interesting
You wake up tomorrow with all your memories intact—but your body has been completely replaced. Would you still be you? What makes a person the same person over time?