[Revised entry by Charles Cross and Floris Roelofsen on May 26, 2026.
Changes to: Main text, Bibliography]
The philosophy of language since Frege has emphasized propositions and declarative sentences, but it is clear that questions and interrogative sentences are just as important. Scientific investigation and explanation proceed in part through the posing and answering of questions, and human dialogues as well as human-computer interactions are often structured in terms of questions and answers….

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