Dialecticae libri duo

work by Ramus

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June 25, 2026

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Dialecticae libri duo (Two Books of Dialectics) is a work by Petrus Ramus, published in 1556. Ramus was a French philosopher, logician, and rhetorician who challenged traditional Aristotelian logic. He identified logic with dialectic, emphasizing its role in discovering and arranging arguments rather than solely as a method of inquiry. Ramus's approach, known as Ramism, gained significant popularity in Europe during the 16th and 17th centuries. His work aimed to simplify logical concepts and integrate rhetoric, influencing educational thought of the time.123

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history of logic
The 16th century
…this work and in his Dialecticae libri duo (“Two Books of Dialectics”) of 1556 he combined attacks on scholastic logic, an emphasis on the use of logic in actual arguments (“dialectics”), and a presentation of a much simplified approach to categorical syllogism (without an attempt to follow Aristotle). Elsewhere, he…
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…this work and in his Dialecticae libri duo (“Two Books of Dialectics”) of 1556 he combined attacks on scholastic logic, an emphasis on the use of logic in actual arguments (“dialectics”), and a presentation of a much simplified approach to categorical syllogism (without an attempt to follow Aristotle). Elsewhere, he…
Read More