Subject: Mathematics

I have heard of Godel's Thoery of Undecidability and I was
wondering how general it was. Does it only a apply to
specific questions in set theory or does it go beyond this?
In particular I want to know if a particular question like
Fermat's Last Theorem (when it was unproven) was thought to 
be possibly undecidable?
Any thoughts much appreciated.
Thanks,
Simon

Re: Mathematics