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← Language & CommunicationWhy does a bottom-up chart parser sometimes generate spurious ambiguity during syntax analysis of a sentence?
A)Lexical rules exhaustively constrain structures
B)Local ambiguity licenses multiple derivations✓
C)Head-driven parsing eliminates alternatives
D)Top-down prediction prunes invalid branches
💡 Explanation
Spurious ambiguity arises in bottom-up chart parsing because local ambiguities allow multiple partial parses to be built independently, therefore leading to redundant derivations despite a single correct structure, rather than being constrained early by top-down predictions.
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