> Stathis Papaioannou wrote:
> > Brent Meeker writes:
> > 
> > 
> >>>Saying that there is a material substrate which has certain properties is 
> >>>just a working 
> >>>assumption to facilitate thinking about the real world. It may turn out 
> >>>that if we dig into 
> >>>quarks very deeply there is nothing "substantial" there at all, but solid 
> >>>matter will still be 
> >>>solid matter, because it is defined by its properties, not by some 
> >>>mysterious raw physical 
> >>>substrate.
> >>
> >>But I don't think we ever have anything but "working assumptions"; so we 
> >>might as 
> >>well call our best ones "real"; while keeping in mind we may have to change 
> >>them.
> > 
> > 
> > That's just what I meant. If you say, this is *not* just a working 
> > assumption, there is some 
> > definite, basic substance called reality over and above what we can 
> > observe, that is a 
> > metaphysical statement which can only be based on something akin to 
> > religious faith.
> > 
> > Stathis Papaioannou
> I put "working assumption" in scare quotes because I think the fact that we 
> can 
> create models of the world that are successful over a wide domain of 
> phenomena is 
> evidence for an underlying reality.  It's not conclusive evidence, but 
> reality is 
> more than just an assumption.
> Brent Meeker

There is good reason to believe that there is some sort of reality out there as 
opposed to the 
solipsistic alternative, but there is less reason to believe that there is some 
basic material substrate 
on which the various properties of physical objects are hung. The two ideas are 
not the same.

Stathis Papaioannou
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