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R-relation/identity/continuity/person/Lewis: certain relationship and connectedness among person states (no identity) - I-relation: what permanent persons are identical to the former ones? - Important argument: both relations are identical, because they are coextensive.
I-relation is not merely defined by identity, it is also derived from the personhood.
Die Identität von Körper und Geist Frankfurt 1989
Konventionen Berlin 1975
Philosophical Papers Bd I New York Oxford 1983
Philosophical Papers Bd II New York Oxford 1986
Cl. I. Lewis
Mind and the World Order: Outline of a Theory of Knowledge (Dover Books on Western Philosophy) 1991