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.