I spend a part of my time doing science and I know a lot of the leading scientists in a lot of different areas. And in mathematics, for example, I think it's fair to say that the people I know who are the best mathematicians in their various areas use Mathematica, and they use it in many cases extremely enthusiastically. Now there are two sociological phenomena that go on in mathematics. One of them is this idea that computers are anathema to mathematics. This is a mistake. It's a fundamental intellectual mistake. You don't have to take that from me; just look at what's going on in the field, look at the fact that the best mathematicians use them.