[FOM] "This sentence is true"

[Matt Insall]

Richard Grandy writes:  

Sometimes it is hard to tell if a sentence is a Liar:

This sentence is false iff Goldbach's conjecture is true.


++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++


I understand, and I agree.  
This is what makes the question of what 
to forbid a question about 
what is true and what is false, 
and which requires investigation, 
and is not prescribable by a machine.  


Matt Insall 
Associate Professor of Mathematics 
University of Missouri at Rolla 
Rolla MO 65409-0020 

(573)341-4901 
montez at fidnet.com