If you look at the history of big obstacles in understanding our world, there's usually an intuitive assumption underlying them that's wrong. In the case of the Solar System it was intuitively obvious that the Earth was at the center of the Solar System and things moved around us, but that just turned out to be wrong. … And it intuitively seems correct that the brain is just some sort of computer—it just seems natural. … But it has undermined almost all of our work to build intelligent machines and understand thinking. It's just wrong … the brain isn't like a computer at all.