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Re: Mathematics in brief
Posted:
Dec 9, 2012 4:14 PM
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On 9 Dez., 20:42, Zuhair <zaljo...@gmail.com> wrote:
> On Dec 9, 9:33 pm, WM <mueck...@rz.fh-augsburg.de> wrote:> On 9 Dez., 18:50, Zuhair <zaljo...@gmail.com> wrote:
>
> > > On Dec 9, 7:34 pm, fom <fomJ...@nyms.net> wrote:
> > > > > "Is x a member of y?" is a purely yes or no question.
>
> > > > Only with respect to a well-construed universe of discourse.
>
> > > WRONG, a "consistent" theory in classical logic is just enough.
>
> > With respect to real numbers we need not only the answer to the
> > question whether x is a real number, but we need trichotomy with
> > respect to every real number. Undefinable numbers cannot satisfy this
> > need.
>
> Of course they can, why not?
How would you decide whether an undefinable number is positive or
negative?
Regards, WM
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