 So too are the most clearly stated aspects of Locke’s view: the claim that persons have consciousnesses, and the accompanying assertion that sameness of person rests in sameness of consciousness. What is consciousness for Locke? What does Locke mean by “sameness of consciousness”? Answering these questions turns out to be difficult, since Locke does not say much about what he takes consciousness to be (and we only know the persistence conditions of any entity, once we get clear on the nominal essence of that entity’s kind, according to Locke). Nevertheless, answering these questions is crucial to understanding Locke’s theory of personal identity since it is consciousness centered.