Context-free Language

In formal language theory, a context-free language is a language generated by some context-free grammar. The set of all context-free languages is identical to the set of languages accepted by pushdown automata.

Read more about Context-free Language:  Examples, Closure Properties, Decidability Properties, Properties of Context-free Languages, Parsing

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    Neither Aristotelian nor Russellian rules give the exact logic of any expression of ordinary language; for ordinary language has no exact logic.
    Sir Peter Frederick Strawson (b. 1919)