Bruno Marchal wrote:
> Le 10-oct.-06, à 16:08, 1Z a écrit :
>
>
>
> > If your Platonism is about truth, bot existence, you cannot show
> > that matter is redundant,
>
>
> Ah! I am glad you see my argument is a redundancy argument. If comp is
> true we cannot rely on the hypothesis of primary matter to explain even
> just the physical laws (not to talk on consciousness).

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Primary matter was never *supposed* to explain either of
those things. That is a straw-man version of materialism.
> > because if your UD doesn't exist
> > in Platonia,
>
>
> ... but the UD exists in Platonia. The ontological status of the UD is
> the same as the ontological status of the number 5.
Whatever that is. A purely mathematical argument can tell us they
have the same ontological status; it cannot tell us what that status
is. The question of what a mathematical existence-claim
means ontologically requires a philosophical argument.
> Peano Arithmetic
> can prove the existence of the UD.
The mathematical existence. Pure maths cannot prove anything
ontologically.
>
>
>
> > it doesn't exist in the material world either, so it
> > doesn't exist at all, and therefore cannot replace anything that does
> > exist.
>
> Actually an instantiation of the UD exists in the "material world" too
> (as far as the material world exists of course). The UD is just a
> prgram. You can see its code here:
> http://iridia.ulb.ac.be/~marchal/bxlthesis/Volume4CC/
> 4%20GEN%20&%20DU.pdf
But it requires infinite time to run.
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