Re: Macroscopic Emergence in MWI worlds

On Mon, Aug 19, 2013 at 3:53 PM, hibbsa <hibbsa-/[email protected]> wrote:
>
>
> --- In [email protected], David Deutsch <david.deutsch@...>
> wrote:
> > On 19 Aug 2013, at 16:55, hibbsa <hibbsa@...> wrote:
> >
> > > So the problem is, MWI has basically has no macroscopic influence.
> >
> > Compared with what?
>
> compared to most all major scientific theories I should think. Even QM
> minus mwi is hugely influential since it is probably behind a large amount
> of the emergence that creates macroscopic reality.
>

Isn't "QM minus MWI" = Copenhagen?  In other words by "subtracting" MWI,
you're really adding in the collapse postulate, since MWI is just QM
without collapse.

Are you really just saying that MWI is untestable?  I.e. that it doesn't
make an refutable predictions?  That's a valid criticism.  I think IF we
can build a large-scale quantum computer, such that it can do more than a
theoretical perfectly efficient computer occupying the same spacetime, that
would be a refutation of Copenhagen, since all that computation has to be
done somewhere.

-- 
Gary


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