On 12 Nov 2013, at 18:15, meekerdb wrote:

On 11/12/2013 2:37 AM, Bruno Marchal wrote:Both with Comp and with Everett-QM we have lost that uniquetheoretical evidence, because our best current explanation (comp,or QM) makes that mind-brain identity non sensical.I don't see anything about QM that makes "mind is what a brain does"non-sensical.

About QM, I don't know. I reason assuming comp (once and for all, to avoid repetition).

`In comp, mind is associated to a relative computation, in the 3p view.`

`And "my 1p-mind" (what counts for immortality question) is associated`

`to an infinity computations.`

Quantum immortality relies on it: QM implies material objects existas states in Hilbert space which evolve unitarily. If mind andbrain are not one-to-one, then your duplication thought experimentsdon't work as arguments.

`I don't see this. The argument assumes only that I will survive with P`

`= 1 in case my brain is replaced by a digital brain. This does not use`

`the one-one identity thesis.`

`There is a dlight difficulty, which is that at the end of the`

`argument, we know that the P(W) = P(M) = 1/2 is false in practice, it`

`is only 1/2 minus epsilon, as we learn that perfect annihilation is`

`*only* theoretical. In fact`

`P(W) = P(M) = 1/2 - P(I survive in Helsinki through quantum or comp`

`tunneling effect). = 1/2 - P(H)`

`Now, if you are not reconstituted in W, nor in M, but still`

`annihilated in H (Helsinki), then`

P(H) = 1 (by comp or quantum tunneling effect), and P(M) = P(W) = 0.

`(of course, this is still an approximation, as there is non null`

`probability that you will feel in W or M by whatever the UD will make`

`you believe this).`

Bruno

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