- I will have different office hours this week. My Monday and Friday office hours are cancelled. I'll have office hours Wednesday (1-2:30) and Thursday (1-2:30). Come by if you have questions about the midterm.
- We will discuss the study questions on Wednesday. Make sure you look at them carefully before then.
- There is no homework for Wednesday.
First we'll hear from groups about Alice...
Parfit and Teletransportation
Real world non-magical teletransportation--
- Scan A on earth
- Send scan to Mars
- Folks on Mars use scan to build individual B on Mars
- Folks on earth destroy A
- If A = B, A made it to Mars!
But does A=B???
Qualitative identity--like two white billiard balls (they are not one and the same thing)
Quantitative (or numerical) identity--like how Superman is Clark Kent (they are one and the same person)
Parfit creates extra perplexity by telling three stories
Qualitative identity--like two white billiard balls (they are not one and the same thing)
Quantitative (or numerical) identity--like how Superman is Clark Kent (they are one and the same person)
Parfit creates extra perplexity by telling three stories
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| Story 1 - Everything functions normally |
 |
| Story 2 - Malfunction. The teletransporter fails to destroy A after A is scanned. A continues to exist. |
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| Story 3 - Double malfunction. The scanner damages A's heart. The teletransporter fails to destroy A after A is scanned. A continues to exist but will die soon after B is on Mars. |
What do the various theories of personal identity say about whether A=B in each story?
Substance theories
- Soul
- Whole Body
- Brain
- Locke
- Parfit
Parfit Powerpoint
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