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[[Image:Square of opposition.svg|right|352px|The traditional square of opposition]]

[[Image:Square101-74.JPG|right|352px|The traditional square of opposition]]

In the system of [[Term Logic|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 [[Syllogism|Syllogistic Logic]], serving to identify the allowed logical conversions from one type to another.

In the system of [[Term Logic|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 [[Syllogism|Syllogistic Logic]], serving to identify the allowed logical conversions from one type to another.