El cuadrado medieval de oposición proposicional y modal, Juan Manuel Campos Benítez

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Juan M. CAMPOS BENÍTEZ

Abstract

We show a sentence and modal square of opposition and equivalence to be expanded into an hexagon according to oe suggestion from William of Sherwood. This expansión is permittedby two sentence and modal rules.The logical relations of the square allow us to formulate several theorems in order to show a glimpse of the Medieval Logic complexity.

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