- Theory (disambiguation)
**Theory**may refer to:;Concepts

*Theory , alogic al explanation for a given set of facts

* Theory (mathematics) a branch of mathematics which covers a single subject (e.g.Number theory )

*Theory (mathematical logic) , the set of statements (conclusions) that can be generated from a set of axiomatic statements (beliefs) and a set of inference rules (logic)

*theory (brand) , a fashion brand

*Theory choice , a problem in the philosophy of science, involving how scientists should choose between competing theories

*Theory and fact , the conceptual difference between theories and facts in science, the basis of the interpretation ofEvolution as theory and fact

*Literary theory

*Music theory , the study of the underlying structure of music.;Publications

*Theory and Event , an electronic academic journal devoted to contemporary questions in political theory

*Theory and Practice of Muslim State in India , a book by historian K.S. Lal

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