Sunday, March 27, 2016

Investigation of Formulae in Predicate Calculus (5)

Allow the universe, to literally be the universe. Now consider the following formula: 
∃x{∃y[¬(x = y)]}. There exists something call it x and there exists something call it y, it turns out it is not the case that x is the same thing as y. This construction is a strange way to say the number two!


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