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Psychology

Abelard was concerned with the concept of intent and inner life, developing an elementary theory of cognition in his Tractabus De Intellectibus, and later developing the concept that human beings "speak to God with their thoughts". He was one of the developers of the insanity defense, writing in Scito te ipsum, "Of this, small children and of course insane people are untouched...lack reason....nothing is counted as sin for them". He spearheaded the idea that mental illness was a natural condition and "debunked the idea that the devil caused insanity", a point of view which Thomas F. Graham argues Abelard was unable to separate himself from objectively to argue more subtly "because of his own mental health."