An epistemological challenge to ontological bruteness

It is often assumed that the first stage of many classical arguments for theism depends upon some version Principal Sufficient Reason (PSR) being true. Unfortunately theists, PSR a controversial thesis has come under rather severe criticism in contemporary literature. In this article, I grant sake argument every false. Thus, concede with critics PSR, it possible there is, at least, one fact ontologically brute. then proffer an epistemological challenge to ontological bruteness. Specifically, argue whenever knowledge seeker, S, perceives unexplained fact, F, never reasonable S believe F conclude that, even if false, more key premise