David Hume 1. Hume says, “If we would satisfy ourselves, therefore, concerning the nature of that evidence, which assures us to matters of fact, we must enquire how we arrive at the knowledge of cause and effect.” Hume then makes the claim that; “knowledge of this relation is not, in any instance, attained by reasonings a priori.” The support for this claim is that knowledge of cause and effect arises entirely from experience. If you presented an object to a man that he had never come in contact with, he would not be able to give you the causes or the effects of this mysterious object. You can not tell the causes or