Re: Introduction (Digital Physics)

From: scerir <>
Date: Tue, 26 Jun 2001 22:02:52 +0200

> > Let us take the realist approach and focus on the things we can actually
> > compute fully.
> > Joel

> Godel's theorem prevents us from simulating all aspects of our
> universe.
> Fred

Is that true?

Goedel's argument does not prove the existence of absolutely
unprovable (arithmetical) truths.

Its conclusion is relative to some first-order axiom system
(of elementary arithmetic), and proves only that there is a true
proposition unprovable in that system.

But there are plenty of other systems in wich that proposition
is provable (mechanically too).

The existence of a proposition unprovable in a given system
requires, also, that the system is consistent. But how is a
computer supposed to know that?

Does the universe know Goedel's theorems?

- Scerir
Received on Tue Jun 26 2001 - 13:07:40 PDT

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