On 09 Dec 2017, at 21:07, Brent Meeker wrote:
On 12/9/2017 2:22 AM, smitra wrote:
On 09-12-2017 02:03, Brent Meeker wrote:
On 12/8/2017 4:49 PM, smitra wrote:
It's not irrelevant if you don't have the information that
locates you in a sector where the uncertainties are indeed small
enough. You have to start with the complete state in the bird's
view, and then consider the sector where you have some definite
information and then project onto that subspace.
That reminds me of a student asked to find the spot where silver
atoms
would strike the detector after passing through a Stern-Gerlach
instrument who started, "Well first you should write down the
Hamiltonian of the Stern-Gerlach magnets..."
The discussions on this list, this is actually relevant.
On this list the advice seems to be, "First, write down the
Hamiltonian of the multiverse."
Only when we do physics. When we do metaphysics, we remind that the
Hamiltonian itself must be recovered from very elementary arithmetic,
if we assume computationalism (comp-, and assume that the Hamiltonian
is not purely geographical (in which case it becomes some "variable"
in a more general theory which has still to be extracted from
arithmetic).
The nice thing with comp, is that incompleteness avoids the collapse
of physics into classical tautology, so we have that physical laws
exists, at least!
Bruno
Brent
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