Platonists about mathematical objects claim that the theorems of our mathematical theories — sentences like ‘3 is prime’ (a theorem of arithmetic) and ‘There are infinitely many transfinite cardinal numbers’ (a theorem of set theory) — are literally true and that the only plausible view of such sentences is that they are about abstract objects (i.e., that their singular terms denote abstract objects and their existential quantifiers range over abstract objects). This general stance toward mathem