Short idea (122): Computers have been compared to brains and spoken of as brains, but the brain has different parts. It seems to me that computers can be correctly compared with the higher cortical brain, the part considered to be responsible for logical thinking, the type of thinking used to solve complex mathematical problems. But computers do not have lower brains, the part of the brain connected with need and want and drive and emotion and passion. Because of this, computers can't be irrational; they can generate random series of numbers, and they can make mistakes, but this is different from being irrational. To be irrational you have to have interests, and you have to have passions that make you act irrationally by going against your interests. Computers don't have interests, so they can't act irrationally. If a computer could be given a lower brain, such a computer would be much more human.