Re: Theory of Everything based on E8 by Garrett Lisi

From: <marc.geddes.domain.name.hidden>
Date: Sun, 25 Nov 2007 19:17:09 -0800 (PST)

On Nov 23, 8:49 pm, Torgny Tholerus <tor....domain.name.hidden> wrote:
> marc.ged....domain.name.hidden skrev:
>
>
>
> > As far as I tell tell, all of physics is ultimately
> > geometry. But as we've pointed out on this list many times, a theory
> > of physics is *not* a theory of everything, since it makes the
> > (probably false) assumption that everything is reducible to physical
> > substances and properties.
>
> I think that everything is reducible to physical substances and
> properties. And I think that all of physics is reducible to pure
> mathematics...

You can't have it both ways. If physics was reducible to pure
mathematics, then physics could not be the 'ontological base level' of
reality and hence everything could not be expressed solely in terms of
physical substance and properties.

Besides which, mathematics and physics are dealing with quite
different distinctions. It is a 'type error' it try to reduce or
identity one with the other.

Mathematics deals with logical properties, physics deals with spatial
(geometric) properties. Although geometry is thought of as math, it
is actually a branch of physics, since in addition to pure logical
axioms, all geometry involves 'extra' assumptions or axioms which are
actually *physical* in nature (not purely mathematical) .


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Received on Sun Nov 25 2007 - 22:17:22 PST

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