 First, even setting radical use theories to the side, many philosophers have supposed that the semantic content of a sentence is somehow determined, at least largely, by what the sentence is customarily used to express. This would seem to entail that there must be a close connection between the semantic content of a sentence and how the sentence is customarily used. But then it is odd if there is the kind of systematic mismatch between assertoric content and semantic content that the fictionalist claims that there is; or that is the worry.