Although phenomenology plays a crucial role in offering internal clarification within the sciences, it is not self-sufficient for the investigation of reality. If we examine Merleau-Ponty’s working method, as it emerges, for instance, from his 1953 course at the Collège de France, The Sensible World and the World of Expression, we find a mode of inquiry that, in practice even before theory, confirms this point. Merleau-Ponty demonstrates his capacity to work within experimental psychology, that is, within the scientific domain itself, in order to draw out its epistemological and ontological implications.