The same move that the deflationary nominalist makes to distinguish ontological commitment from quantifier commitment is also used to distinguish ontological commitment to Fs from asserting the truth of ‘There are Fs’. Although mathematical theories used in science are (taken to be) true, this is not sufficient to commit us to the existence of the objects these theories are supposedly about. After all, according to the deflationary nominalist, it may be true that there are Fs, but to be ontologically committed to Fs, a criterion for what exists needs to be satisfied. As Azzouni points out: