From an epistemological perspective, both the positive and negative theses of intuitionism are flawed. The intuitionists claim to provide a certain foundation for their version of mathematical truth by it (mentally) from intuitively certain axioms, using intuitively safe methods of proof. This view bases mathematical knowledge exclusively on subjective belief. But absolute truth (which the intuitionists claim to provide) cannot be based on subjective belief alone. Nor is there any guarantee that different intuitionists’ intuitions of basic truth will coincide, as indeed they do not.