EntityQ3874243· pop 18· linked from 117 articlesSheffer strokeSign in to savelogical operation that asserts that at least one of its operands is falseConnectionslogical NOREntityfunctional completenessEntitypropositional calculusEntitypropositionEntitylogical negationEntitylogical operatorEntitymonotonic functionEntitydisjunctive normal formEntitylogical truthEntityJózef Maria BocheńskiEntitydualityEntityJean NicodEntityBertrand RussellEntityInternational Standard Book NumberEntityDavid HilbertEntityprogramming languageEntitydigital object identifierEntitymathematical logicEntityAlfred North WhiteheadEntityCharles Sanders PeirceEntityCategoriesInterlanguage link template existing linkLogical connectivesLogic gatesLogic symbols