The received wisdom is that truth-conditional semantics presupposes and entails certain externalist ontological commitments. The idea is simple enough: if a semantic theory specifies (compositional) truth conditions, then, for any given sentence that is true, the theory will specify the very conditions that hold such that the sentence is true. Presumably, such conditions are exactly ways the world might be that make our truths true and our falsehoods false. Semantics is world-involving merely by dint of being truth-involving. A general worry for this picture, no matter how otherwise tempting it might be, is the occurrence of referentially defective words and expressions, ones that appear properly to contribute to the truth conditions of sen...