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Grammatical abbreviations are generally written in full or small caps to visually distinguish them from the translations of lexical words. For instance, capital or small-cap PAST (frequently abbreviated to PST) glosses a grammatical past-tense morpheme, while lower-case 'past' would be a literal translation of a word with that meaning.
material conditional (material implication) implies, if P then Q, it is not the case that P and not Q propositional logic, Boolean algebra, Heyting algebra: is false when A is true and B is false but true otherwise.
In traditional logic, a particular negative categorical proposition, stating that some members of the subject class are not members of the predicate class. [2] [218] or A logical connective (disjunction) that links propositions in a way that the compound proposition is true if at least one of the linked propositions is true. ordered logic
Logical connectives can be used to link zero or more statements, so one can speak about n-ary logical connectives. The boolean constants True and False can be thought of as zero-ary operators. Negation is a unary connective, and so on.
Negation is a unary logical connective. It may furthermore be applied not only to propositions, but also to notions, truth values, or semantic values more generally. In classical logic, negation is normally identified with the truth function that takes truth to falsity (and vice versa).
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Because the logical or means a disjunction formula is true when either one or both of its parts are true, it is referred to as an inclusive disjunction. This is in contrast with an exclusive disjunction, which is true when one or the other of the arguments are true, but not both (referred to as exclusive or, or XOR).
A pejorative suffix is a suffix that attaches a negative meaning to the word or word-stem preceding it. There is frequent overlap between this and the diminutive form.. The pejorative suffix may add the sense of "a despicable example of the preceding," as in Spanish -ejo (see below).