Personal identity
What makes a person at one time the same person at another.
What it commits you to
Personal identity is the theory of what grounds persistence: bodily continuity, psychological continuity, memory, character, or something none of these. It is the concept behind the problem of uploads and copies, where two continuations cannot both be identical to one original. Every answer to that problem carries a cost, which is why the case has not been dissolved.
Which realms lean on this
Philosophy carries the arguments the other four kinds are downstream of — what an agent is, what a person owes, what a rule is for.
philosophy · 8 realms — The Care Weft, The Contractual Court, The Existential Wilds, The Kantian Citadel, The Longview Foundry, The Middle Kingdom, The Pragmatic Wharf, The Sangha Terraces.
See also
No-self
philosophyThe Buddhist analysis denying that a person has a fixed, independent essence.
Mind upload
philosophyCopying a mind into a software substrate, and everything that follows from copying.
Moral status
ethicsThe property of counting as a party that can be owed something and can be wronged.
Chinese room
philosophySearle's thought experiment arguing that syntax alone cannot constitute understanding.