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Identity/time/self/I/Nozick: because it is highly conceptual, a scheme appears to be necessary - this should choose between near and immediate successors, etc. - But I do not need the scheme to find out my goals, but to find out whose goals are mine. - Problem: who applies actually the scheme?
Definition I/self/some authors: to be an I or to be self, means to have the ability of reflexive self-reference.
NozickVs: 1. This ability must just have existed sometime - 2. beings: from the fact that I have this ability, it does not follow that it is essential. - In addition: the reflexive self-reference gives me access to the self, but that does not guarantee that it is part of my nature as self.
Philosophical Explanations Oxford 1981
The Nature of Rationality 1994