EntityQ784645· pop 8· linked from 62 articlesUniversal instantiationSign in to saveRule of inference in predicate logicConnectionsfirst-order logicEntityInternational Standard Book NumberEntityOCLC, Inc.Entitycommutative propertyEntityassociativityEntityWillard Van Orman QuineEntitypropositional calculusEntitydistributive propertyEntityDe Morgan's lawsEntityquantifierEntityreferenceEntityuniversal quantificationEntitymodus ponensEntitylogical consequenceEntityexistential quantificationEntitymodus tollensEntityvalidityEntityrule of inferenceEntitycontrapositionEntityGerhard GentzenEntityCategoriesPredicate logicRules of inference