It would be a mistake, however, to look for an explanation of Kelsen’s argument in the logic of Kant’s transcendental argument. (Kelsen himself seems to have changed his views about this over the years; he may have started with a kind of neo-Kantian perspective one can discern in PT1, and gradually shifted to a Humean version of his main argument, which is quite evident in GT. However, this is a very controversial issue; for a different view, see Paulson 2013 and Green 2016.) Kant employed a tra