Le 16-août-06, à 15:28, 1Z a écrit :

> Bruno Marchal wrote:
>> Note also I have not yet seen physical theory which does not assume
>> numbers.
> Physical theories assume the validity of mathematical statements.
> That doesn't mean the existence of numbers. Everyone agrees that
> numbers can't be empirically detected, so if they don't exist that
> changes
> nothing about the theory.

Of course I was again using "existence" in the mathematical sense. Here 
I was just saying that you cannot axiomatize any physical theory (rich 
enough to explain if only the appearance of observations) without 
accepting the independence of truth like "it exists a number such that 
Recall once and for all that I don't believe at all (especially by 
comp) in any form of substantial numbers or think like that.  When I 
say that numbers exist, I take it as a mathematical statement, not a 
metaphysical one. The metaphysics, or better the theology, relies in 
the fact that the comp hypothesis needs an act of faith.
Note that taking a plane or just going out of my bed in the morning 
asks some faith too, once comp is assumed (btw).



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