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A Logic of Questions and Answers

David Harrah
Philosophy of Science
Vol. 28, No. 1 (Jan., 1961), pp. 40-46
Stable URL: http://www.jstor.org/stable/185462
Page Count: 7
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A Logic of Questions and Answers
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Abstract

A logic of questions and answers exists within the logic of statements, if we make the following identifications (roughly): "Whether" questions are identified with true exclusive disjunctions, and "which" questions are identified with true existential quantifications. The question-and-answer process is interpreted as an information-matching game. The question mark is not needed except as a device of abbreviation. Complete and partial answers can be distinguished and various relations of relevance, independence, and resolution defined.

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