During the whole history of Computer Science as we know it, the end goal has been to solve problems faster and more efficiently than us humans. Computers came to be to perform repetitive tasks we do not want to or do not have time to perform ourselves. At some of them, such as simple mathematical calculations, they were and they are indeed better and faster than a human being. With the appearance of computers, some effort was also put in the study of the human brain and the idea of building machines with similar principles of operation: The idea of emulating conscience has always been attractive to humankind.