On 12/11/2011 8:33 AM, Bruno Marchal wrote:
On 11 Dec 2011, at 07:13, meekerdb wrote:
On 12/10/2011 3:50 AM, Bruno Marchal wrote:
Some say that the interference of particles "with themselves" in the two-slit
experiment is amble evidence for these, but MWI does nothing to explain why we
observe the particular universe that we do.
Comp explains this completely, by explaining why you cannot understand that you are
the one ending in Washington instead as the one ending in Moscow. It explains
contingencies by consistent extensions.
But then starting from Philadelphia instead of Brussels "you" should end up in
Washington - since it is much more similar to Philadelphia.
That might indeed be the case if my consciousness supervene on a generalized brain
including a city, which get an internal role in the computation leading to your state.
But in that case you have to ask the doctor to do the awkward substitution at *that* level.
Yes, that goes back to my concern that the "right level" may include a large part of the
universe. Which is also related to the 323 argument. Quantum mechanics would say that we
(our brains) are extensively entangled with the rest of the universe and, as Russell puts
it, the 323 register may be active in the other Everett branches. The idea of
substituting a mechanism for part (or all) of ones brain is only plausible because we live
in an quasi-classical world
In the W and M duplication experience, we assume that the brain is the usual biological
one in the skull. All what will matter in the probabilities is the distinguishibility
of the self-localization outcome after the duplication. IN QM terms, seeing Brussels,
Washington, and Philadelphia are orthogonal state, and not part of the brain, or of the
computation leading to the state before the multiplication.
I don't know what you mean by "seeing is not part of the brain". Seeing different things
presumably correspond to orthogonal states of the brain.
Of course Philadelphia is just an example. I could choose even closer continuations.
Suppose you are just reconstituted in Brussels, where you started, as well as Moscow.
Does this mean "your" consciousness remains in Brussels while in Moscow there is not-Bruno?
In front of the (concrete or not) UD, your consciousness will do the selection at the
right level. (Again like in the Quantum MW).
There is no selection in MWI - everything happens.
Brent
Bruno
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