Penelope Maddy has attempted to develop a form of realism in mathematics (Set Theoretical Realism) that is not plagued by the sort of epistemological problems that beset traditional Platonism. Maddy advances the radical doctrine that we can and do causally interact with sets. We can see them, feel them, smell them, and even taste them. This chapter raises a series of objections to Maddy's version of realism.
Keywords: Penelope Maddy, Set Theoretical Realism, Platonism