Published online by Cambridge University Press: 27 November 2018
Personal identity is not always symmetric: even if I will not be a later person, the later person may have been me. What makes this possible is that the relations that are criterial of personal identity—such as memory and anticipation—are asymmetric and ‘count in favor of personal identity from one side only’. Asymmetric personal identity can be accommodated by temporal counterpart theory but not by Lewisian overlapping aggregates of person stages. The question of uncertainty in cases of personal fission (and in Everettian quantum mechanics) is also discussed.
Thanks to Don Baxter, Karen Bennett, Tad Brennan, Phillip Bricker, Eddy Chen, Andrew Chignell, Andy Egan, Adam Elga, Hilary Greaves, Liz Harman, Jenann Ismael, Mark Johnston, Tom Kelly, David Kovacs, Peter Lewis, Nan Li, Daniel Manne, Kate Manne, Luke Manning, Andrew McGonigal, Jill North, Daniel Rubio, Jonathan Schaffer, Josh Schechter, Erin Taylor, Briana Toole, David Velleman, and referees.