They declare that all epistemic norms of justification are a priori in nature. They further maintain that providing causal explanation is no part of epistemology (Chisholm, 1992). Causal questions and matter of justification are to be kept strictly separate. So, according to traditional epistemologists, to judge whether a person’s belief that p counts as knowledge that p, it is sufficient to find out if p is connected in the right way to other propositions, the rightness of the connection to be determined by logic (Kitcher, 1983). That is, the evidential story and the causal story should be kept strictly separate because the former is necessarily normative, while the latter is descriptive; in providing an epistemic justification of a piece of knowledge, it is not necessary to probe the question of its origins.