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Ubi dubium, ibi libertas

Estudia no para saber más sino para saber algo mejor

Lucio Anneo Séneca

"duda con propiedades del vacio?"
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buendia
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(missing resource [message.user.registered] for locale [en_US] :05:52 del 23 de Mayde 2008
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(missing resource [message.published] for locale [en_US] : 05:54 del 23 de Mayde 2008 (missing resource [message.title] for locale [en_US] : duda con propiedades del vacio?

la demostracion que he visto parte de suponer que un x esta en el vacio y se infiere que x esta en A para todo A. como rasonamiento es valido pero, si se comiensa con una propocicion falsa se puede inferir lo que SEA. en este sentido mi duda es sobre que tan valido es demostrar asi, y que consecuencias tiene en un sistema deductivo.

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