 The second degree of certainty associated with evident propositions is exemplified by a proposition that not only appears certain and inclines the judgment to assent, but is also a proposition that cannot fail to signify correctly. According to Wodeham all propositions of this type are categorical and necessary. And, he distinguishes them from those contingent types of propositions which may have every appearance of being true but yet may turn out to be false (LS II:163, ll.17–20).