 Sanches is clearly a nominalist. In fact, midway through QNS/TNK, he writes in capital letters: “KNOWLEDGE IS PERFECT UNDERSTANDING OF A THING” (TNK: 200). As Joseph Moreau points out in “Doute et Savoir chez Francisco Sanches” (1960), this conception of knowledge or science as the “absolute and perfect” understanding of a thing, is a left-over of ancient thought (1960: 37). But again, in any case, such “perfect understanding” only means apprehending all the qualities of a particular object of perception. It does not mean apprehending the object or the thing-in-itself, to put it in Kantian terms. Sanches writes: