Man's finitude is heralded and imperiously so in the positivity of knowledge; we know that man is finite, as we know the anatomy of the brain, the mechanics of production costs, or the system of IndoEuropean conjugation; or rather, like a watermark running through all these solid, positive, and full forms, we perceive the finitude and limits they impose, we sense, as though on their blank reverse sides, all that they make impossible.