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8 votes
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How do I use the "Barbara, Celarent, … etc." mnemonic?

Explanation of the Mnemonic Brody, Boruch A. "Logical Terms, Glossary of." Encyclopedia of Philosophy. Ed. Donald M. Borchert. 2nd ed. Vol. 5. Detroit: Macmillan Reference USA, 2006. 533-560. Gale ...
Geremia's user avatar
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5 votes
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Did William of Soissons prove the law of explosion in the 12th century?

This is, perhaps, one of the earliest surviving derivations of the law of explosion, known by the Latin name ex falso sequitur quodlibet, contradiction implies anything. It seems very counterintuitive,...
Conifold's user avatar
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4 votes
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Who first said: "Never deny, seldom affirm, always distinguish"?

The quotes reachable through search on the Internet can all be traced back to Randall B. Smith's book which was first published in 2021. By terminus ante quem, this is probably Smith's or a fellow's ...
Tankut Beygu's user avatar
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1 vote

"Animal is human": human is not among the five predicables

Can you clarify what you mean by humanity not being essential nor accidental to animality? If by essential you mean that it is found in the definition of animal, and thus all animals are human, then ...
randomindividual's user avatar
1 vote
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Where does Aquinas get his "logical-metaphysical presuppositions"?

St. Thomas states in Summa Theologica I-II q. 94 a. 2 co. that all what you call "certain 'logical-metaphysical presuppositions'" derive from the principle of non-contradiction, which ...
Geremia's user avatar
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