 Both of Quinn’s contentions have been challenged. The claim that reflection on the acknowledged reality of religious diversity reduces individuals’ justified confidence in the superiority of their position has been subject to at least two types of criticism. As noted earlier in our discussion of religious diversity and epistemic obligation (section 3), some philosophers agree with Alvin Plantinga that the proponents of a given religious perspective need not grant that their competitors are actually on an equal epistemic footing and are thus justified in continuing to maintain that their perspective is superior without further reflection (Plantinga 1997, 296). 