To the philosopher, the logician, and the linguist, questions have a special fascination. The two main views of language, that it describes the world, and that it expresses thought, are not directly applicable to questions. Ques tions are not assertions. A question may be apt, sharp, to the point, impor tant, or it may be inappropriate, ambiguous, awkward, irrelevant or irreverent. But it cannot be true or false. It does not have a truth value not just because an utterance like Was the letter long? does not indicate which letter is being talked about. The indicative The letter was not long...