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Descartes' Error
Damasio's 1994 landmark, which used clinical evidence from brain-damaged patients to demolish the four-century separation of
reason from
emotion and establish feeling as the infrastructure of practical judgment.
Descartes' Error: Emotion, Reason, and the Human Brain, published by Antonio Damasio in 1994, is the book that reshaped cognitive neuroscience's understanding of the relationship
between thinking and feeling. Its central claim — that emotion is not the enemy of reason but its essential infrastructure — was advanced through clinical cases of patients with ventromedial prefrontal damage whose lives fell apart despite intact IQ. The book introduced the
somatic marker hypothesis and the case of
Elliot, and framed the Cartesian mind-body split as a philosophical error with three centuries of practical consequences. Thirty years later, the book reads as a preemptive critique of the computational theories of mind on which contemporary AI architectures depend.
In The You On AI Field Guide
The title is deliberate. René Descartes, writing in 1637, had separated res cogitans (thinking substance) from res extensa (extended matter) with a sharpness that would shape four centuries of Western philosophy, psychology, and eventually artificial intelligence. Damasio's book is a direct rebuttal: the