The view associated with W. K. Clifford holding that the correct handling of evidence is a necessary condition of believing things as we should. Although the connection may seem obvious, there are difficulties over the potential infinite regress, if propositions taken as evidence themselves require an evidential basis. There is also a question of the authority of the requirement, and whether failing to meet it, for instance in contexts where faith comes into play, should count as a moral, or prudential, or purely epistemic vice, or even no vice at all. See also Agrippa, faith, virtue epistemology.