If I judge it correctly then most people here regard materialism not as a metaphysical position, but merely as a description how the world (as far as we know it) works, inferred from the evidence we have. It is not a statement about what *really* exists at the fundamental level (this may be unknowable or even a useless question to ask). Correct?
I don't know what most people here think, but the discussion so far has centered on Materialism as a metaphysical position - this has been explicitly stated.
However modern philosophical Materialism is not a metaphysical position, it is more an analytical position. Modern Materialism does not say "everything is matter", instead is focusses on how theories (including folk theories about every day reality) can be reduced to, or eliminated in favour of, other more specific scientific theories.
For example Eliminative Materialism claims that folk theories about the mind will be eliminated and replaced by completed neuro-science.
On the other hand a reductionist speaks of one theory reducing to another using inter-theoretic identities.
I don't think that this serves any better purpose than metaphysical materialism but I am just clarifying.
I ask myself how certain statements about the world that seem to be made frequently by materialists follow straight from the evidence with as little interpretation as possible (especially no metaphysical speculation).
-"There are only material things."
But how often do you hear this said by a Materialist?
Nothing in physics makes this impossible:
Nothing in physics makes it so either. And this makes it just as untenable a position as "everything is matter".
Also, if we embrace the theory that relates mental states to computations in the mathematical sense (which is very compatible with our observations), we are not localized in any part of the universe, because we really live in an computational (non-physical) world and the physical universe is an appearance emerging from the structure of computations. So minds that are described by computations are primary rather than a physical world that gives rise to minds.
Again, just as unprovable and unfalsifiable as "everything is matter".
Why have any metaphysical position at all - since none can be demonstrated to be true or false?
Does a metaphysical position provide any value? Does it add anything to our sum of knowledge?
If not then why have it at all.
Chuck metaphysics out - it serves no purpose.