 Suppose, as may one day be medically feasible, an individual A's still functioning upper brain is transplanted from A's body to the debrained, but living, body formerly belonging to B. Upon being transplanted A's upper brain is connected to what remains of B's central nervous system so that a person, call her A-B, results. A-B believes herself to be A, can Q-remember what happened to A, has A's psychological dispositions, and so on. Should we say that A-B is the same person as A, the same person as B, or an altogether new person? Psychological continuity theorists will have little hesitation in answering that A-B is the same person as A.