On 7/05/2016 2:50 am, Bruno Marchal wrote:
On 06 May 2016, at 01:13, Bruce Kellett wrote:
But this does not work, as Feynman and Everett already explained
with the double slit. In "Fabric of Reality" David Deutsch made it
even clearer using for slits.
You are confusing the Feynman paths of the path integral formalism
with separate worlds.
I did not.
David Deutsch is famous for this particular idiotic confusion. You
have just defined a 'world' above as a set of things closed for
interaction. On that definition (with which I agree), the paths
through the separate slits in a two-slit set-up cannot be separate
worlds -- they are just separate paths in the Feynman sense.
All they need to be are different terms in the wave expansion. They
are superposed states/worlds/situations/whatever.
That just leads to linguistic confusion. And the more linguistically
confused you become, the less able you are to reason clearly.
Bruce
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