Logic & ProofSets, Logic & Proofs › Logic & ProofConditional statements, proof methods, logical connectives, and quantifiersAll Terms (26)AxiomConclusionConditionalConjectureConjunctionContrapositiveConverseCorollaryCounterexampleDisjunctionExclusiveExclusive orHypothesisif and only ifInclusiveInclusive orProof by ContradictionInductionInverse of a ConditionalLemmaModus PonensModus TolensPostulateQEDTheoremTautologyMore in Sets, Logic & ProofsBounds, Intervals & Ordering9Number Systems & Properties16Set Theory19