Bruno Marchal wrote:
> Le 26-août-06, à 22:44, Brent Meeker a écrit :
>
> >  I understand Peters objection to regarding a "mere bundle" of
> > properties as existent.  But I don't understand why one needs a
> > propertyless
> > substrate.  Why not just say that some bundles of properties are
> > instantiated and
> > some aren't.
>
> I guess Peter needs it for having a notion of (absolute) instantiation.

If you think, as I do,  that there is a difference between
logical and physical posibility, you need to explain instantiation.

If you think, as I do,  that there is a difference between
phsyical actuality and physical posibility, you need to explain
instantiation.

if you think, as rationalists do, that everything possible
is also necessary and actual, you don't need those
distinctions.

> If Peter takes the relative notion of instantiation, which is number
> theoretical in nature, then he would loose any motivation for his bare
> matter.

I don't think something can exist in relation to what does not exist.
if that is what you mean.

> >  Anyway, current physical theory is that there is a material
> > "substrate" which has properties, e.g. energy, spin, momentum,...
>
>
> I doubt this. Yes current *interpretations* of physical theories do
> suppose a material substrate, but only for having peaceful sleep (like
> the collapse non-answer in QM).

All theories assume contingency.

> Anyway, the theories does not
> presuppose it. They presuppose only mathematical structure and
> quantitative functor between those mathematical structure and numbers
> that we can measure in some communicable ways.

No physical theory needs to presuppose numbers as
having an existence of their own. Formalists
can do physics.

> Bruno
> 
> http://iridia.ulb.ac.be/~marchal/


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