My aim in this chapter is to take issue with Graham Bird's treatment of Kant's mathematical antinomies in his recent commentary on the first Critique.1 It is an imposing and magisterial commentary, running to over 800 pages, every one of which contains significant insights and displays admirable scholarship. My disagreement, in such a context, is minor. That said, at the end of the chapter I shall suggest, albeit very inchoately, a way in which this disagreement connects with some reservations that I have about Bird's fundamental project, which is to repudiate what he calls "traditionalist' interpretations of Kant in favour of what he calls a "revolutionary' interpretation