Full Idea
Aristotle's logic is based on the triadic syllogism, the distinction between subject and one-place predicates, that universal claims have existential commitment, and bivalence, excluded middle and noncontradiction.
Gist of Idea
Aristotelian syllogisms are three-part, subject-predicate, existentially committed, with laws of thought
Source
report of Aristotle (Prior Analytics [c.328 BCE]) by Robert Hanna - Rationality and Logic 2.2
Book Reference
Hanna,Robert: 'Rationality and Logic' [MIT 2006], p.31