 Aristotle, General Topics: logic |  Aristotle, General Topics: metaphysics |  Aristotle, Special Topics: on non-contradiction |  contradiction |  dialetheism |  future contingents |  generalized quantifiers |  Grice, Paul |  implicature |  logic: and games |  logic: classical |  logic: connexive |  logic: intuitionistic |  logic: many-valued |  logic: modal |  logic: paraconsistent |  logic: relevance |  Parmenides |  pragmatics |  presupposition |  semantics: Montague |  square of opposition |  truth values |  vagueness 