  Leslie’s argument is, in the sense outlined above, categorical—he holds that, as the claim of the resurrection meets all four criteria (the memorials being supplied by the Christian commemoration of the last supper and the transfer of the day of worship from the Sabbath (Saturday) to the first day of the week (Sunday)), the certainty of the matter of fact in question is “demonstrated.” This rather bold claim opens the possibility of refutation of Leslie’s principle by counterexample, though reportedly Conyers Middleton, a contemporary of Hume whose critique of the ecclesiastical miracles was notable for its thoroughness, searched vainly for years for a counterexample to Leslie’s principle. Be that as it may, a criteriological argument may also be constructed on the basis of a more modest principle, such as that if any reported event meets all four of these criteria, then it is reasonable to accept its historicity.