Prior to his roundly discredited and immediately rejected 'Meditations', DesCartes might have passed through history without harming the generalised western intellect. Somehow, despite being thoroughly dismissed even in his own time, this specific work of his has attained some sort of immortality in the so-called collective unconscious of westerners everywhere (though presumably mostly in the west, of course). For Platocrates, knowledge was true belief. Aristotle, I believe, added that it required justification, as well. From this point on, the traditional view of knowledge stood for nearly two-thousand years without much trouble. And then DesCartes somehow managed to get people to implicitly tack on unsightly certainty as necessary to the beast. Knowledge , in italics and perhaps always with a capital 'K', needs must be certain, whereas there may be some sense in which lower-case, not-italicized knowledge does not--but we desire Knowledge , surely! Ultimate, unmitigate...
Anything, everything, and nothing at all for years at a time.