There is a necessary recursion at the very heart of epistemology. Epistemology can never be founded upon a principle of linearity, where thinking traces its origin to something that lies before thinking, and somehow emerges or grows out of it, because the very existence of this "before", whatever its nature, must always be assumed...

I'd like to make a contribution with regards to circularity/linearity, from a geometrical standpoint.  If you don't like geometry, stop reading, or better yet, read with increased intensity. The polarity between circle/line is one that is fundamental to many geometries - they are taken to be quite different logical entities.  Primarily this arises because of...