Question

explain the concept of dialects

Answer 1

hey frnd...
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a variety of a language that is distinguished from other varieties of the same language by features of phonology, grammar, and vocabulary, and by its use by a group of speakers who are set off from others geographically or socially. ... The literary dialect is usually taken as the standard language.
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Answer 2

Answer:

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The notion that history conforms to a “dialectical” pattern, according to which contradictions generated at one level are overcome or transcended at the next, was incorporated—though in a radically new form—in the theory of social change propounded by Karl Marx.