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'works', 'works' and 'Introductions to 'Aesthetics and the Phil of Art''
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5. Theory of Logic / E. Structures of Logic / 2. Logical Connectives / c. not
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Negation of negation doubles back into a self-relationship [Hegel, by Houlgate]
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5. Theory of Logic / G. Quantification / 2. Domain of Quantification
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De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]
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