  Maddy also employs the following problematic style of argument. She thinks that the fact that philosophical debates (e.g., about realism) are wide open but that mathematics has developed in a particular way (e.g., to allow impredicative methods) shows that philosophical debates have not affected the outcome of modern mathematics (e.g., 2007,  348). But the fact that a debate about realism is wide open in philosophy does not mean that it is wide open in mathematics. Perhaps mathematicians have implicitly taken a realist stance, which in part underlies their acceptance of impredicativity, even as philosophers continue to debate the correctness of realism as a philosophy of mathematics. Mathematics may be philosophically parti pris, which is why it has developed the way it has.