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date: 22 November 2019

Abstract and Keywords

Whereas Hobbes is well-known for his criticism of Aristotelian metaphysics, he did not criticize Aristotle’s logic. Instead, he made syllogism the natural outcome of man’s invention of language. Whether he considered logic as a science or as the ars demonstrandi, he viewed it as inseparable from human nature. Hobbes’s treatment of logic is consistent from the Anti-White through to De corpore. His Computatio sive Logica should be understood to consist of two parts. Chapters 1 and 6 are about philosophy and the right method for acquiring scientific knowledge; and chapters 2 through 5 reshape traditional logic. A doctrine original with Hobbes, ensuring the unity of those two parts, is that ideas of individuals are compound ideas. Hobbes redefines syllogism as an addition of names answering the decomposition of the complex idea of an individual. Reasoning with universal names is then extended to abstract names, necessary for the achievement of philosophy.

Keywords: Aristotle, Anti-White, Computatio sive Logica, method, ideas, names, syllogism

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