 One way out of this argument is simply to claim that some real possibilities are primitive or ungrounded. This appears to be an option for Kant in his critical period insofar as he is no longer committed to rationalist principles such as the Principle of Sufficient Reason (see Abaci 2019). Still, even in his critical period (i.e., after 1770 or so), Kant never repudiated the earlier proof—and supposedly claimed in a lecture from the 1780s that it “can in no way be refuted” (Kant LPT [AK 28: 1034]). This suggests that in his critical period Kant still held that God’s existence is the only available ground for real possibility, but that the explanatory point may justify at most a kind of theoretical belief (Glaube) rather than full demonstrative knowledge (see Chignell 2009, Stang 2016, and Oberst 2020).