In Demis Hassabis's case, you know, he's building something which he himself says is dangerous, right. Why do you do that. What makes you want to do it.And the answer in his case is scientific curiosity. He is so burningly determined to understand what he calls the fabric of reality that he expresses that ambition in spiritual language, that to understand nature is to become closer to God. Then I think if you look at the other end of the spectrum, you look at Mark Zuckerberg, for him it's always been really ...