Donald Hoffman describes his mathematical theory that ties in with consciousness touching into neuroscience, computer science, perception, and how we construct reality. Donald David Hoffman (born December 29, 1955) is an American cognitive psychologist and popular science author. He is a professor in the Department of Cognitive Sciences at the University of California, Irvine, with joint appointments in the Department of Philosophy, the Department of Logic and Philosophy of Science, and the School of Computer Science. Science and Nonduality is a community inspired by timeless wisdom, informed by cutting-edge science, and grounded in direct experience. We come together in an open-hearted exploration while celebrating our humanity.