Prima facie, it may sound counterintuitive to state that ‘there are infinitely many prime numbers’ is false. But if numbers do not exist, that's the proper truth-value for that statement (assuming a standard semantics). In response to this concern, Field 1989 introduces a fictional operator, in terms of which verbal agreement can be reached with the platonist. In the case at hand, one would state: ‘According to arithmetic, there are infinitely many prime numbers’, which is clearly true. Given the use of a fictional operator, the resulting view is often called mathematical fictionalism.