There is widespread consensus that there are undercutting and rebutting defeaters that diminish or destroy the warrant of a belief B. I argue that there are counterparts of defeaters: the counterparts of undercutting defeaters are “requirement fulfillment beliefs”, the counterparts of rebutting defeaters are “consistency beliefs”. These beliefs confirm the warrant of B, I therefore call them “confirmers”.

Alvin Plantinga declared in 1983 that Classical Foundationalism had collapsed. He was convinced that he had found an utterly damaging argument against CF: CF is self-referentially incoherent. Already Alston and Quinn and recently DePoe have denied that Plantinga’s argument is successful. There are three objections against his argument:i) He has to show that there is no argument for CF; ii) there may be an inductive argument for CF; iii) there are other good arguments for CF, presented e.g. by Richard Fumerton. (...) In this paper I will argue that i) is wrong and that Quinn’s inductive argument fails. Plantinga has shown that the “old” type of CF is self-refuting. Plantinga’s argument is not successful if aimed against a contemporary Fumerton-style CF because this type of CF differs in at least one relevant aspect from the kind of CF Plantinga was struggling with. (shrink)