Stathis Papaioannou wrote:
Peter Jones writes:
> Stathis Papaioannou wrote:
> > Peter Jones writes:
> > > Stathis Papaioannou wrote:
> > >
> > > > Although you have clearly stated that the two ideas - consciousness
> > > > supervening on all physical processes and consciousness supervening on
> > > > no physical process - are completely different I think they are related
> > > > that in both cases matter is irrelevant to consciousness,
> > >
> > > In the second case, matter is relevant to consc. since it is
> > > relevant to physical processes.
> > Did you mean "in the first case..."?
> > Matter is irrelevant to the extent that any piece of matter will do for a
> > and a change in the matter does not change the computation - unless you are
> > considering the special subset where the computation interacts with the
> > of its implementation, which is all the computations we are ever going to
> > by definition.
> It is a mistake to infer that matter does not matter at all, that it is
> The two cases you mention are not the same. In one you do not need any
> particular kind of matter. In the other, you do not need matter at all.
OK, that is strictly true. Still, it is more elegant to postulate that no
world exists than that there exists (at least) a single quantum state which
the entire apparent universe.
The idea that a minimal phsyical situation can "sustain" a universe
I realise this is not a knock-down argument.
> > From the Stanford Encyclopedia of Philosophy:
> > "A set of properties A supervenes upon another set B just in case no two things
can differ with respect to A-properties without also differing with respect to their
> > From this definition, the mental does not supervene on the physical in
> > of the cases I mentioned.
> No, that is mistaken. The mental/computational properties supervene
> on the physical properties in any particular realisation.
> implies that mental properties can be multiply realised, true, but each
> obeys supervenience.
The A properties are mental, the B properties physical. Multiple physical
may implement the same computation, i.e. there is a one: many relationship
the A properties and the B properties, respectively. This is not controversial,
it is really
just a restatement of functionalism. However, it is the reverse situation which
problematic, a many: one relationship between the mental and the physical,
will note is not consistent with the definition of supervenience given above.
showed that just such a relationship would seem to hold between physical
consciousness. Even more simply, it is possible to interpret a single physical
implementing multiple computations, as I have discussed before.
Only if someone is doing the actual interpetation. But then you don't
ha a minimal physical universe, because the interpreters are really
existing beings too.
So the supervenience
thesis of computationalism seems flawed. If you are still keen on
are willing to drop the supervenience thesis you end up with Bruno's version of
If you think computationalism without the physical computers is absurd then
need to drop computationalism.
Maudlin's argument is flawed.
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