Psychoanalytic data are used to support a radical view in philosophy—that knowledge, not belief, is the central epistemologic entity, with knowledge prior to and necessary for belief, not vice versa. The psychoanalytic data come from two very different sources: clinical material and experimental research on unconscious (subliminal) processes, both demonstrating evidence for unconscious knowledge without belief. The article, a thoroughly interdisciplinary endeavor, also supplies examples of other types of knowledge (conscious and unconscious) without belief, lending further and convergent evidential weight in favor of the knowledge-first position.