On 9/28/2019 3:42 PM, Alan Grayson wrote:


    The "new"  matter (and energy and space and information) are
    discounted by the probability of their existence. It seems curious
    to me that the MWI advocates want to take the wave function
    ontologically but not the Hilbert space.  From the viewpoint of
    Hilbert space all the different "worlds" are just subspaces on
    which the wave-function of the multiverse can be projected.  A
    world "splitting" is just the unfolding of a world into two
    orthogonal subspaces.

    Brent


*Are there any distinguishing features to these orthogonal subspaces? If we traveled to one of them, would we detect anything different or unusual from the space in which we previously resided? AG *

You would notice that the quantum measurement you did had just resulted in UP (or DOWN).

Brent

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