Human beings strive for understanding of what is going on in the world. They want to understand why the planets take their specific orbits, how life came about, why some actions are morally wrong and so on. No wonder then that curricula at schools and universities often list understanding as one of the primary goals of education and training. And no surprise that the sciences and humanities, but also art and religion, promise a better understanding of the world or at least of some aspects of it.