 PIJ is controversial, especially its second clause. It is important to note that either clause of the principle can be used by itself to generate the allegedly vicious regress for the philosopher who rejects foundations. It is the two clauses combined that are supposed to present the anti-foundationalist with an infinite number of vicious regresses. A number of philosophers (among them foundationalists) would argue that the second clause of PIJ confuses levels of epistemic questions. It is far too strong to require someone to have a justified belief in a probabilistic connection between available evidence and the conclusion reached on the basis of that evidence. Such a requirement is at best plausible for having second-level justification, justification for the epistemic belief that one has an inferentially justified belief. In responding to a challenge presented to one’s having an inferentially justified belief in P on the basis of E, one might find oneself searching for justification to support the claim that E makes probable P, but that is only because in the context of the challenge one is trying to support or justify the claim that one has a justified belief. A similar claim might be made with respect to clause (1) of the principle, although it is more difficult to generate the supporting intuition.