Self-evident propositions are divided in to two subdivisions...

Self-evident propositions are divided in to two subdivisions: primary self-evident propositions, whose affirmation does not require anything except the exact imagining of the subject and predicate, such as the proposition of the impossibility of the unity of contradictories, which is called ‘the mother of all propositions’. The other is secondary self-evident propositions whose affirmation depends on the use of sensory organs, or things other than the imagination of the subject and predicate.

They are divided into six groups: those pertaining to the senses, to conscience, to speculation, to innate constitution, to experience, and to testimony. The truth of the matter is that not all of these propositions are self-evident. Only two groups may really be considered to be self-evident. First, the primary self-evident propositions, and…