On Tue, Aug 22, 2006 at 11:50:07AM +0200, Bruno Marchal wrote:
> >
> > To be sure, this is not how I interpret Maudlin or the movie-graph
> > argument. I interpret it as NOT COMP or NOT PHYS SUP or NOT
> > SINGLE_UNIVERSE.
> >
> > In a multiple universe (eg Everett style MWI), all counterfactuals are
> > instantiated as well, so physical supervenience (over all branches) is
> > compatible to COMP, and not equivalent to a recording.
>
>
>
>
> This is a very interesting remark, although I am not convinced. I have
> also believed for a while that a material universe could be saved by
> the way the quantum multiverse actualizes the counterfactuals.
> But if that were true, consciousness would not supervene on a
> *classical* machine running deterministically an emulation of a
> universal quantum turing itself running my brain, making comp false.
I have put this to you in the past, but you have always responded that
the multiple universes always emerges out of the UD, leaving me most
confused as to whether I support the COMP position or not.
> Your move could belong to what I will perhaps eventually call "the
> magical use of matter for explaining (away) consciousness". That move
> is subtler with respect to the movie-graph, than with respect to the
> seven first step of UDA.
> But I think you are correct, and it could be a pedagogical clever idea
> to show first clearly that the movie graph entails (not-comp OR
> not-phys-sup OR many-world), and then to show the perhaps less easy
> point that the concrete primitively material many-world is a red
> herring in this setting.
Physical supervenience is not equivalent to assuming a concrete
primitive material world. The latter is an additional assumption.
> We should come back on this in a "the 8th step" (movie graph) thread.
>
> Bruno
>
>
> http://iridia.ulb.ac.be/~marchal/
>
>
>
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Received on Tue Aug 22 2006 - 22:12:38 PDT