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Fallacies: Part 3, Book 4 of Summa Logicae

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Fallacies, by William of Ockham (AD 1287-1347), is the last book (Part 3, Book 4) of the Summa Logicae (Summary of Logic), a medieval textbook on syllogistic logic which is divided into three parts: terms, propositions and syllogisms, broadly speaking.

Fallacies is the medieval nominalistʼs response to Aristotleʼs Sophistical Refutations (De Sophisticis Elenchis). It treats of the fallacies of equivocation, amphibology, composition and division, accent, figure of speech, secundum quid et sim...