The munchausen trilemma undermines the concept of “weighing the evidence”. Everything anybody believes to be true is either founded upon circular reasoning, a reasoning of infinite regression, or an arbitrary set of unprovable axioms. The consequence is that any level of belief in any truth can only be based upon faith. People who believe that their world view is based entirely upon facts and universal truths tend to have a very hard time accepting this. They will often say that scrutinizing something to that level is a pointless waste of time for things that are so obviously true, which is perhaps ironically the exact behaviour also exhibited by the most closed minded of the true believers that they often find themselves so frustrated by.