Rationality can be used to critique itself. This is what philosophers do:
advance positions by arguing for them, and critique positions by arguing
(rationally) against them.
But to examine the relative worth of logic itself you have to go outside
the system and see how it does compared to competitive systems in terms
of survival, happiness, effectiveness, etc. (In case it isn't obvious,
I think it does very well by those criteria.)
-- David McFadzean david@lucifer.com Memetic Engineer http://www.lucifer.com/~david/ Church of Virus http://www.lucifer.com/virus/