Personal Identity

Personal Identity - Phi 340 Three Hard Facts about Personal...

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Phi 340 3-28-07 Three Hard Facts about Personal Identity: (HF1) Persons persist through time. (HF2) Persons can survive (sometimes quite drastic) physical and psychological changes. (HF3) "I know who I am (i.e., that I am the same person, that I have survived ) without needing to check with my five senses." General Constraints on Any Adequate Criterion of Personal Identity (CPI) In order to be adequate, a CPI must give a wholly general, informative, necessarily true "if and only if" statement specifying the changes that a person can (and the changes that a person cannot) continue to exist through (survive). Soul Criterion of Personal Identity (SCPI) person A at time t = person B at time t+ if and only if B at t+ has the same soul as A at t. -No Interaction Argument and Population Explosion Argument raise serious questions about SCPI. Population  Explosion Argument  against SCPI (1) If SCPI is true, then for all anyone knows, each of us a different person  from moment  to moment (2) We do know  that not each of us is a different person  from moment  to moment (3) Therefore, SCPI is not true -- Population  Explosion Argument  relies on the fact that souls in others' bodies are undetectable. -This means that it is consistent with any evidence that you could have about an individual human body that a continuous stream of psychologically very similar souls flows through the body. Psychological Criteria of Personal Identity ("Persons as Psychologically Continuous Processes")       Psychological Criteria is stated as periods in or stages in a person's existence Using "stage" terminology, a CPI sorts sets of stages by saying what  relationship  links those stages together  to make up exactly one person. -1-(PCPI1) person stage A at time t is a stage of the same person as person stage B at time t+ if and only if B at t+ has all of the same psychological characteristics as does A at t. -PCPI1 is too strong since it conflicts with HF2: people can and do change their psychological characteristics over time. -2-(PCPI2) person stage A at time t is a stage of the same person as person stage B at time t+ if and only if B at t+ has some of the same psychological characteristics as does A at t. -PCPI2 is too weak, since almost any two individuals are sure to share
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This note was uploaded on 03/19/2008 for the course PHI 340 taught by Professor Austin during the Spring '08 term at N.C. State.

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Personal Identity - Phi 340 Three Hard Facts about Personal...

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