Very hard for things to get into his long-term memory, once there they can be recalled and - so long-term memory, if it get there, is good, but his ability to handle lots of facts coming simultaneously, certainly shown by - he doesn't get any pleasure from what gives me great pleasure, sort of Beethoven's sonatas, things which- or later Prokofiev or something, where they've very subtle and you hear lots of sounds coming at you fast. It's not clear the brain can actually handle it. It becomes blurred. It's certainly important to know, because it's how you try and compensate for these limitations. In Rufus's case, he didn't want to go to school 'cause he couldn't do the work. We thought, you know, it was something much more complicated - he didn't want to go to school 'cause he felt he'd be rejected, etc. No, he just didn't want to be in a situation where he couldn't perform. And as he got older, that became harder for him to see. So - so I've always, when I was young my IQ was not that of a genius or anything, so I thought I would never, you know, be a highly successful academic though I wanted to be one. I think I took sort of security in the fact that biologists seemed to be a lot dumber than theoretical physicists. And so I was going into a field where you didn't have to be as bright. With time, I think my teachers thought I was all bright, even though I didn't feel it. So I'm sure if I had to take an IQ test, I wouldn't do very well, but I wasn't very good in actual visual things, turning things upside down and seeing symmetry, which you could say, well, how did you ever get the DNA thing? Well, the answer is Francis. He had the, you know, thought symmetry, whereas my strengths lay in reading comprehension. I could, you know, I seem to do that the fastest in my school, which is more a test that a girl does better. And then, you know, I learned that the reason why the IQs of boys and girls are the same when we have different strengths and weaknesses is they balance the test by giving you a combination of tests where girls do well and men do well. And so it can always be that way, but it doesn't of course tell you whether you would be good at a given field. So IQ is just a - and because boys develop earlier, you could argue that boys, I mean, the boys develop later, that you shouldn't compare a 12-year-old girl with a 12-year-old boy, you should compare a, you know, a 12-year-old boy with an 11-year-old girl because the girls develop sooner or something like that. If you kept tests with the same proportions boys who then have a slightly higher IQ, not much difference, but it's arbitrary to start with. You really have to look at the components before you want to predict people.