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On the origin of Morgan's Laws
Resumen
Se manejan hoy dÃa conceptos en la Lógica Moderna cuyos orÃgenes no siempre han sido bien establecidos. Un caso tÃpico de ello pueden ser las Leyes atribuidas a Augustus de Morgan y conocidas por ello con tal nombre, cuyos orÃgenes, sin embargo, hay que retrotraer unos cinco siglos, hasta la época de los ignorados lógicos terministas. En este trabajo se estudian los orÃgenes de dichas Leyes, con los titubeos iniciales hasta que se establece la doctrina, y algunas aclaratorias que, a la luz de las Leyes, se pueden hacer en tópicos de Lógica Proposicional y del Algebra de Boole. Aclaratorias y precisiones, por ejemplo, sobre la cantidad y cualidad de las proposiciones compuestas, o de cuál sea el elemento formal de las mismas.
Palabras clave: Leyes de Morgan, Walter Burleigh, proposiciones compuestas.
Abstract
Today, there are two concepts in Modern Logic, whose origins have not always been well established. A typical case may be the Laws attributed to Augustus Morgan and, thus known with that name, whose origins, however, must be traced back some five centuries, to the time of the much ignored terminist logicians. In this work, the origins of such a Law are studied, along with the initial hesitations until the doctrine is established, as well as some clarifications that, upon the basis of the Laws, could be made in topics of Propositional Logic and Boole's Algebra. Clarifications and precisions, for instance, about the quantity and quality of composed propositions, or about what is their fundament.
Key words: Morgan's Law, Walter Burleigh, composed propositions.