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'A Problem about Substitutional Quantification?st1=Saul A. Kripke', 'Laws of Nature' and 'Sameness and Substance'
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4. Formal Logic / A. Syllogistic Logic / 2. Syllogistic Logic
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15879
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The Square of Opposition has two contradictory pairs, one contrary pair, and one sub-contrary pair [Harré]
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