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Discussing English grammar, the term "double negative" is often, [9] though not universally, [10] [11] applied to the non-standard use of a second negative as an intensifier to a negation. Double negatives are usually associated with regional and ethnical dialects such as Southern American English , African American Vernacular English , and ...
In propositional logic, the double negation of a statement states that "it is not the case that the statement is not true". In classical logic, every statement is logically equivalent to its double negation, but this is not true in intuitionistic logic; this can be expressed by the formula A ≡ ~(~A) where the sign ≡ expresses logical equivalence and the sign ~ expresses negation.
In other cases, it can be used. (See Gender in English.) The word it can also be used as a dummy subject, concerning abstract ideas like time, weather, etc., or a dummy object of a verb or preposition. The third-person form they is used with both plural and singular referents.
The first English grammar, Bref Grammar for English by William Bullokar, published in 1586, does not use the term "auxiliary" but says: All other verbs are called verbs-neuters-un-perfect because they require the infinitive mood of another verb to express their signification of meaning perfectly: and be these, may, can, might or mought, could, would, should, must, ought, and sometimes, will ...
Some elementary teachers use raised minus signs before numbers to disambiguate them from the operation of subtraction. [21] The same convention is also used in some computer languages. For example, subtracting −5 from 3 might be read as "positive three take away negative 5", and be shown as 3 − − 5 becomes 3 + 5 = 8, which can be read as:
In proof theory, a discipline within mathematical logic, double-negation translation, sometimes called negative translation, is a general approach for embedding classical logic into intuitionistic logic. Typically it is done by translating formulas to formulas that are classically equivalent but intuitionistically inequivalent.
Equivalence class: given an equivalence relation, [] often denotes the equivalence class of the element x. 3. Integral part : if x is a real number , [ x ] {\displaystyle [x]} often denotes the integral part or truncation of x , that is, the integer obtained by removing all digits after the decimal mark .
I think we should mention from the beginning that using double negatives to intend negative concord is considered bad English. We can and should mention that these rules are ultimately artificial, and that their non-use by so many English-speakers renders the rules rather *arbitrary*. But it’s still okay to state what the rules ARE. My 4th ...