EntityQ3492863· pop 13· linked from 344 articlespropositional variableSign in to savemathematical representation of truth or falsehoodConnectionspropositional calculusEntitysemantic theory of truthEntitymathematical logicEntityBoolean algebraEntitylogical operatorEntityquantifierEntityfirst-order logicEntityformal systemEntitytruth valueEntitypredicateEntityrecursive setEntitysemantics of logicEntityfree and bound variablesEntitystructureEntityground expressionEntitydiagramEntitylogicEntityInternational Standard Book NumberEntityLatin scriptEntityset theoryEntityCategoriesConcepts in logicLogic symbolsPropositional calculus