When one considers, on the other hand, that Descartes' project was to sustain doubt in a provisional manner until truth appeared in the reality of a self evident idea, then one sees very well that the non Cartesian nature of modern thought, at its most decisive, begins not in a discussion of innate ideas, or an incrimination of the ontological argument, but rather in the text of Le Neveu de Rameau, in the existence that it designates in a reversal that would not be understood until the time of lderlin and Hegel.