This paper outlines a multidimensional conception of Multiple Personality Disorder (MPD) that differs from the 'orthodox' conception in terms of the content of its commitment to the reality of the self. Unlike the orthodox conception it recognizes that selves are fuzzy entities. By appreciating the possibility that selves are fuzzy entities, it is possible to rebut a form of fictionalism about the self which appeals to clinical data from MPD. Realism about self can be preserved in the face of multiple personalities.