Square of Opposition
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Square of Opposition

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High Quality Content by WIKIPEDIA articles! In the system of Aristotelian logic , the square of opposition is a diagram representing the different ways in which each of the four propositions of the system are logically related ('opposed') to each of the others. The system is also useful in the analysis of Syllogistic Logic, serving to identify the allowed logical conversions from one type to another.In traditional logic, a proposition (Latin: propositio) is a spoken assertion (oratio enunciativa), not the meaning of an assertion, as in modern philosophy of language and logic. A categorical pro...