Abstract

What are the metaphysical and metapsychological boundaries of a person? How do we draw our borders? This much is clear: personal identity without thought experiments is impossible. I develop a new way of conceptualizing physiological and psychological borders leading to a re-evaluation of the problem of personal identity within the contemporary literature, especially Parfit, arguing that we must, necessarily, turn to the conceptual analysis of metaphysical and metapsychological borders. I offer an explanation of the persistence of common sense against philosophical analysis, criticize Wilkes's position, and provide a foundation for the proper use of thought experiments in analytic metapsychology and metaphysics