“…However, there is reason to suspect that this reliance on constitutive principles of understanding does not allow for a sufficiently rich account of relativization. For instance, Friedman describes the relativized a priori as ‘dynamical’, allowing for radical transformations from one a priori framework to the next (Friedman 2001: xii, 31, 41, 45–7, 63, 101, 118, 123; see also French and Massimi 2013: 232–3). Yet even though the universal and necessary status of Kant’s a priori has here been nominally rejected, the fixed and unchanging status Kant confers on constitutive principles must be retained – at least within the perspective of the framework they make possible.…”