Ambiguous grammar refers to a type of formal grammar in which a single string (or sentence) can be generated by the grammar in multiple ways, producing more than one distinct parse tree or derivation. This ambiguity means that there may be multiple interpretations or meanings associated with that string, depending on the different parse trees. In the context of programming languages and compilers, ambiguous grammars can lead to confusion and difficulties in parsing, as they do not provide a clear association between syntax and semantics.
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