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Full article: Was Lewis Carroll an Amazing Oppositional Geometer?

Logical Oppositions in Arabic Logic: Avicenna and Averroes

Location and Mereology (Stanford Encyclopedia of Philosophy)

TMS D9 Discovery of Deduction Logic Final Flashcards

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logic - Square of Opposition with percentages? - Philosophy Stack Exchange

Medieval Theories of the Syllogism (Stanford Encyclopedia of

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A History of Logic Diagrams - ScienceDirect