On 10/14/2019 2:50 PM, Bruce Kellett wrote:
On Tue, Oct 15, 2019 at 7:05 AM 'Brent Meeker' via Everything List <[email protected] <mailto:[email protected]>> wrote:

    On 10/14/2019 12:00 PM, John Clark wrote:
    On Mon, Oct 14, 2019 at 2:20 PM 'Brent Meeker' via Everything
    List <[email protected]
    <mailto:[email protected]>> wrote:

        /> So it becomes probability of finding yourself in a
        particular world...which depends on a theory of consciousness /


    I'll be damned if i can see what consciousness has to do with it.
    The Born rule would also give the probability a film camera with
    a automatic one second timer will take a picture that when
    developed will turn out to be a picture of Moscow.

    But according to MWI it will also take a picture of Washington. 
    The Born rule isn't part of MWI...it has to derived (or more often
    just borrowed from CI).  Suppose the camera is triggered by the
    decay of a radioactive atom and it is taking a picture of a
    clock.  What time will it have on its film?  Must we suppose there
    are an uncountable infinity worlds with different times recorded?


Yes, given MWI. Deutsch even requires an infinite number of parallel worlds, with "shadow" photons, even for the simple two-slit experiment.

There's a technical reason MWI needs an infinite number of branches.  It's only in the statistical limit that one can guarantee that the sample probabilities agree with the Born rule.

Brent

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