Full Idea
Normally we identify experiences in terms of the persons whose experiences they are; but this will lead to a vicious circle if persons themselves are to be analysed in terms of their experiences.
Gist of Idea
We identify experiences by their owners, so we can't define owners by their experiences
Source
A.J. Ayer (The Concept of a Person [1963], §I)
Book Reference
Ayer,A.J.: 'The Concept of a Person etc' [Macmillan 1973], p.84
A Reaction
This (from a leading empiricist) is a nice basic challenge to all empiricist accounts of personal identity. One might respond my saying that the circle is not vicious. There are two interlinked concepts (experience and persons), like day and night.