It is argued that, given certain reasonable premises, an infinite number of qualitatively identical but numerically distinct
minds exist per functioning brain. The three main premises are (1) mental properties supervene on brain properties; (2) the
universe is composed of particles with nonzero extension; and (3) each particle is composed of continuum many point-sized
bits of particle-stuff, and these points of particlestuff persist through time.
Keywords Mind - Functionalism - Supervenience - Individuation
Thanks to the audience at an informal talk given at Princeton University, which included Allison Dawe, Cian Dorr, Benj Hellie,
Brian Kierland, Aaron Konopasky, and Chad Mohler. For helpful comments on a previous version of this paper, we thank David
Lewis. And thanks to an anonymous referee of Minds and Machines.