Summa Logicae

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Sum of Logic
Author: William of Eocester.
Subtitle: The Foundations of Reason.
Language: Common, Old Common.
Document Type: Textbook.
Genre: Logic, Textbook.

The Summa Logicae is a textbook on logic by William of Eocester. This work established Eocester as an early logician and rational monastic scholar.

Systematically, it resembles other works of medieval logic, organised under the basic headings of the classical philosophy; terms, propositions, and syllogisms. These headings, though often given in a different order, represent the basic arrangement of all Eocesterian textbooks.

This work is important in that it contains the main account of Eocester's nominalism. The nominalist scholars looked upon him as the founder of their school.