Nor can you prove that you have one.  Of course, asking me to prove that
you don't beggars the question of whether or not one can logically prove
a negative.
> Besides, if there is no free will, then there's no point to existence
> because everything's already predetermined and we should all just kill
> ourselves right now.  Why not?
Oh, free will isn't necessary to me feeling a need to survive; as long
as "I"'m surprised by the next thing down the pike its OK.  Note that a
lack of free will doesn't mean predestination in the least; Brownian
Motion is completely without free-will, each particle is constrained to
react in X way to Y variables.  It is, however, always surprising to
watch the jinking and swirling of Brownianly moving particles, at least
to me.
Mind you, I'm not trying to dissuade you from killing yourself.  I
encourage everyone to do so at least once in their lives.
[Anyone that commits suicide simply based on the weight of my suggestion
probably doesn't deserve to continue to live and reproduce (perhaps
especially the latter) in the first place; I'm now an agent of the
Selection Police.]
-- 
Alexander Williams {zander@photobooks.com   ||Member: Evil Geniuses
                    thantos@alf.dec.com}    ||For a Better Tomorrow
============================================// => Charter Member <=
"Perhaps we should lower our mental trousers and compare the size of
 our consciousnesses?"
				       -- Jan Sands to Marvin Minsky
					  comp.ai.genetic
====================================================================
		<http://www.photobooks.com/~zander/>