  There are no clear exemplars of the view that mathematical standards should be authoritative in philosophy of mathematics, hence the question mark. David Lewis flirted with this position in his monograph on set theory (1991, viii–ix, 54), but by the time of his (1993) had already repudiated it. The position is suggested by remarks in Maddy (1997), though as we will see in section 5, Maddy (1997) is more naturally interpreted as advancing a heterogeneous form of naturalism. Several other philosophers of mathematics are also professed naturalists, notably Alan Baker (2001) and Mark Colyvan (2001).