Abstract

Whether the mind is thought to be physical or non-physical, philosophers generally agree that there is an intimate connection between the mind and the self. Dualists have always maintained that the person is his mind and that he just happens to have a particular body. There has also been support for this in classical and contemporary literature on personal identity in the discussions of numerous hypothetical cases involving the transfer of “mental contents” from one body to another, often in the form of “brain transplants”. In connection with each case the following question was raised: Does mental continuity guarantee that one will be the same person or is spatio-temporal continuity necessary? Most philosophers have thought that spatio-temporal continuity is not necessary, but that mental continuity is. Finally, very recently there has been much interest in two types of abnormal phenomena—the “split-brain” and multiple personalities—which give indications of there being more than one mental stream associated with a single body and, as a result, philosophers discussing these phenomena have thought that there is good reason to think of there being more than one self involved in such cases.