Beyond this criticism, there are further problems attendant on the use of proof as a basis for certainty in mathematics. Nothing but a fully formal deductive proof can serve as a warrant for certainty in mathematics. But such proofs scarcely exist. Thus absolutism requires the recasting of informal mathematics into formal deductive systems, which introduces further assumptions. Each of the following assumption is a necessary condition for such certainty in mathematics. Each, it is argued, is an unwarranted absolutist assumption.