On 19 Oct 2013, at 00:56, meekerdb wrote:
On 10/18/2013 1:38 PM, Jason Resch wrote:
On Fri, Oct 18, 2013 at 11:27 AM, meekerdb <meeke...@verizon.net>
wrote:
On 10/18/2013 12:26 AM, Jason Resch wrote:
On Thu, Oct 17, 2013 at 10:03 PM, meekerdb <meeke...@verizon.net>
wrote:
On 10/17/2013 6:04 PM, LizR wrote:
On 18 October 2013 13:42, Jason Resch <jasonre...@gmail.com> wrote:
The basis problem is no different from the "present" problem
under special relativity: If we exist in many times across space
time, why do we find ourselves in this particular "now"?
I don't know about the basis problem, but the now problem is
simple to solve - we don't find ourselves in a particular now,
find ourselves in all the nows.
But I don't find myself in all the nows. Why not?
I've highlighted the answer for you. Why should anyone (including
you) take the word of one particular Brent from one particular
time, that other Brents do not find themselves in other times?
Note that in some basis I *am* in a superposition.
How does the theory of mind you are operating under predict what
being in a superposition should feel like?
First, my theory of mind makes mind dependent on classical
processes in a physical brain - so it explains why experiences are
of the classical.
Okay.
But Bruno's theory takes experience as logically prior to the
physical. So he can't appeal to the physical aspects of the brain
to make experience classical.
He assumes this when he says our consciousness is supported by a
Turing emulable process. Turing machines are classical.
Second, you and I are in superpositions relative to some bases. So
how does it feel?
Let me make sure I understand the question. Let us say we are in a
metal box (like Schrodinger's cat), and we measure the spin state
of some electron's y-axis. Outside of this box, there is an
observer, and from his perspective, we within the box remain in a
super position of having measured both states. You are asking what
it feels like to the person inside the box in the superposition,
from the perspective of the person outside the box?
If so, I think the answer is rather clear. It doesn't matter what
the person outside the box thinks, within the box the electron's
spin is no longer in the superposition, and neither is the person
who measured it. Their experiences have diverged. From the
perspective of the person outside the box, they know that the
person inside will be performing the measurement and has split.
Had they known the entire state of the wave function within the
box, they could predict it is now in a superposition where one
observer has measured and written down "spin is up", and the other
where the observer has written "spin is down", but even from the
perspective of this external observer, he does not find any state
in the evolved wavefunction of the box where the two observers have
some kind of shared memory of seeing both states.
That's a Copenhagen description in which superpositions are
destroyed instead of just being dispersed into the enivronment.
Why? On the contrary; the superposition is not destroyed. The first
observer memeory is just entangled with the state of the particle.
If you take MWI seriously the whole system (including the observers)
are in superpositions and to say that the observers see either "spin-
up" or "spin-down" is assuming that there is some projection
operator that neatly separates the superpositions in that basis.
But to say that is the preferred basis is to beg the question. Not
begging the question is "the basis problem".
But the natural evolution, and the building of a brain does select a
base, if you accept that our memory state is classical, which is the
case in comp. The fact that we don't "feel superposition" is only an
empirical confirmation that we have a classical brain, approximated by
a quantum, but macroscopic, brain. The human original universal
machine, our ancestor the amoeba, has chosen the base. It is a
geographical-historical happening.
Bruno
Brent
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