morality. As for the technique of doubt in Montaigne and Descartes, it is inseparable, technologically, as we shall see from the criterion of repeatability in science. The print reader is subjected to a black and white flicker that is regular and even. Print presents arrested moments of mental posture. This alternating flicker is also the very mode of projection of subjective doubt and peripheral groping. Applied knowledge in the Renaissance had to take the form of translation of the auditory into visual terms, of the plastic into retinal form. * The Renaissance discoveries of Father Ong, detailed in his Ramus: Method and the Decay of Dialogue (from which we