How did Peter Abelard use logic in the study of theology?

Peter Abelard was a pioneering figure in medieval thought who applied Aristotelian logic and dialectical methods to the study of theology, significantly contributing to the development of Scholasticism.12

His most notable application of this approach is found in his work Sic et non (Yes and No), where he compiled 158 theological questions alongside contradictory statements from authoritative church figures. Rather than providing immediate resolutions, Abelard used his expertise as a logician and student of language to formulate rules that helped students reconcile these apparent inconsistencies. He encouraged readers to analyze the various senses in which words were used over time, forcing them to think critically while maintaining the ultimate authority of the Bible.123

By treating theology as a subject for rigorous dialectical analysis, Abelard shifted the focus of intellectual inquiry toward a more rational and systematic exploration of faith. Although his methods were controversial and faced condemnation by contemporaries like St. Bernard de Clairvaux, his dialectical framework became a preferred tool for later theologians, such as Peter Lombard, who used it to structure the formal study of theology.2