As in the case of Sense-certainty, here in the case of Perception, by following the protagonist consciousness’s efforts to make this implicit criterion explicit, we see how the criterion generates contradictions that eventually undermine it as a criterion for certainty. In fact, such collapse into a type of self-generated skepticism is typical of all the shapes we follow in the work, and there seems something inherently skeptical about such reflexive cognitive processes. But this is not the type of skepticism that is typical of early modern philosophy, such as that used by Descartes in his attempt to find some foundation of indubitability on which genuine knowledge can be built (Forster 1989). As is clear from his treatment of ancient philosophy in the Lectures on the History of Philosophy, Hegel was attracted to the type of dialectic employed by Socrates in his efforts to get his interlocutors thinking about something beyond that given immediately in sensation (LHP II: 51), and implicit in the ancient form of skepticism that had been employed after Socrates (LHP II: 344). For Hegel, the ancient skeptics captured the skeptical moment of thought that is the means by which thought progresses beyond the particular categories that have given rise to contradictions. Just as in the way a new shape of thought, Perception, had been generated from the internal contradictions that emerged within Sense-certainty, the collapse of any given attitude will be accompanied by the emergence of some new implicit criterion that will be the basis of a new emergent attitude. In the case of Perception, the emergent new shape of consciousness, the Understanding, explored in Chapter 3, is a shape identified with the type of scientific cognition that, rather than remaining on the level of the perceived object, posits underlying forces involved in the production of the perceptual episode.