 Pruss goes further to suggest that the PSR in particular is “self-evident, obvious, intuitively clear, in no need of argumentative support” (2006: 189). For example, he holds that the Principle of Sufficient Reason—“necessarily, every contingently true proposition has an explanation” (he defers on whether the principle also applies to necessarily true propositions)—is self-evident in the sense that anyone who understands it correctly understands that it is true. These persons might not know it to be self-evidently true, but they do understand it to be true. This is consistent with other persons denying it is self-evident, for those who deny it might misunderstand the principle in various ways. 