  Dogmatic moral skepticism is, moreover, a universal and abstruse claim. It is the claim that all moral beliefs have a certain epistemic status. Normally one should not make such a strong claim without some reason. One should not, for example, claim that all astronomical beliefs are unjustified unless one has some reason for this claim. Analogously, it seems that one should not claim that all moral beliefs are unjustified unless one has some positive argument. Thus, its form, like its conflict with common sense, seems to create a presumption against moral skepticism.