On 12 Dec 2017, at 02:41, Brent Meeker wrote:
On 12/11/2017 4:54 PM, smitra wrote:
As I have said before, the biggest challenge for quantum physics
is to
explain the emergence of the classical world from the quantum
substrate, so that classical calculations actually get the correct
answers in those classical situations. If you do not believe that
these classical calculations are correct, then I advise you not ever
to drive your car on a busy road.....
There is no way a Hilbert space can become a classical
configuration space. If one sticks to a falsified theory (in the
domain where you can hide the shortcomings under the carpet) and
cast doubt on a theory that has withstood rigorous experimental
tests, then it's likely that attitude that's the cause of most
problems.
That's what I mean by logic chopping. Everything is quantum
therefore every uncertainty is quantum uncertainty...therefore all
insurance companies should be studying Hilbert space. This
overlooks the fact that the classical world is far better
empirically supported than the quantum world and there is
consistency between quantum mechanics and our theory of spacetime.
It is like Bruno's argument that starts with the assumption that his
theory is correct in order to prove that fundamental physics
(whatever that is) is wrong.
?
Yes, that is the idea: we start from a theory, derive a conclusion and
then text it. In this thread the theory is SWE. The classical realm is
only appearance well explained by Everett decoherence. Then with
mechanism, up to now we use fundamental physics to refute or confirm
mechanism, and it is indeed confirmed by QM (without collapse). I use
fundamental physics, why would I think it to be wrong? It is the
metaphysics of some physicists which is shown to be incompatible with
mechanism, not physics. You attribute me something I never said. Like
Bruce, you confuse physics (which is neutral on 0, 1, 2, ...
universes) and metaphysics. The thinking is not driven by wanting to
make good, FAPP, predictions, but to interrogate the truth of the
situation.
Bruno
Brent
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