On 6/9/2013 5:21 AM, Bruno Marchal wrote:
Then fictionalism can make sense only if we assume some basic physical existence, or
reality, as the not explicit contrary of "fiction".
Yes. Fictionalism is probably right about mathematics - but it's also right
about physics.
Elementary arithmetic seems conceptually simpler than any physical notion,
All the more reason to suppose it is just an invention.
and with comp I think there is not much choice in the matter (in all senses of
the word).
A pair of two non null integers x y such that (x/y)^2 = 2, that is fiction.
No, that is false in arithmetic.
Brent
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