Duncan Patton a Campbell wrote:
> On Sun, 6 Jan 2008 22:21:14 -0500
> "Eliah Kagan" <[EMAIL PROTECTED]> wrote:
> 
> > (There are also multiple useful,
> > mutually-inconsistent formal systems in both fields.)
> 
> Provably so?
> 
Euclidean and ono-Euclidian geometries should suffice.

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