On 04 Nov 2015, at 19:41, John Clark wrote:
On Mon, Nov 2, 2015 at 2:45 AM, Bruno Marchal <[email protected]>
wrote:
>> We know from Gleason's theorem that in 3 spatial
dimensions only the square of Schrodinger's wave (the Born rule),
and not the cube or anything else, can yield a probability without
inconsistencies; so the real question isn't why is the Born rule a
square but why is it a probability at all.
> But that is the part which is explained by the "Many-Worlds
Interpretation" of QM. That is what Everett has done
OK, I can't find a lot to disagree with you there. Many-Worlds
gives the best explanation for why probabilities and not certainties
exist at the quantum level that I know of, and that and the fact
that it doesn't need to define "consciousness" or "observation" is
why I like it.
Everett still does need to explain observation, but it does not need a
magical theory: the brave old Descartes mechanism works well, except
that mechanism makes obligatory to justifies the wave itself from all
computations (or it remains resting on a magical use of some primary
matter).
> So it appears that you are coherent now. If you reject the
FPI in computationalism, you need to reject it in Everett, but
[...]
But I don't reject "FPI" in ANYTHING! I've known since I was 2
that sometimes a person doesn't know what is going to happen next.
By a non intrinsic ignorance. But with self-duplication and/or self-
superposition, the ignorance is intrinsic. Even an omniscient God
cannot predict the result of self-measurement in those cases.
Bruno
John K Clark
then I am no more sure why you defend the MW.
Bruno
John K Clark
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