 Arguably, Descartes’ mind-better-known-than-body doctrine is intended as a comparative rather than a superlative thesis. We have seen that, for Descartes, the only superlative perceptual state is that of clarity and distinctness. The only guarantee of truth in our introspective judgments is, like all other judgments, when they are based on clear and distinct perception: if I clearly and distinctly perceive myself to be in mental state x, then I am in x.