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David_Solomon comments on Timeless Identity - Less Wrong

23 Post author: Eliezer_Yudkowsky 03 June 2008 08:16AM

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Comment author: David_Solomon 03 June 2008 03:36:13PM -1 points [-]

I can understand why creating a reconstruction of a frozen brain might still be considered 'you'. But what happens if multiple versions of 'you' are created? Are they all still 'you'? If I create 4 reconstructions of a brain and put them in four different bodies, punching one in the arm will not create nerve impulses in the other three. And the punched brain will begin to think different thoughts ('who is this jerk punching me?').

In that case, all 4 brains started as 'you', but will not experience the same subsequent thoughts, and will be as disconnected from each other as identical twins.

This is basically the first Parfit example, which I note you don't actually address. Is the 'you' on mars the same as 'you' on Earth? And what exactly does that mean if the 'you' on earth doesn't get to experience the other one's sensations first hand? Why should I care chat happens to him/me?