Now a very important person in my South African life is someone- that is Seymour Papert. Seymour was someone about my age, contemporary of mine, and Seymour was a brilliant, is still a brilliant mathematician and in fact, much later in the course, he was also very interested in politics and philosophy and it was much later, while I was a medical student, that I got to know him very well and in fact, he taught me mathematics and I taught him physiology. Thank God it wasn't the other way around. And he is someone who I think got me interested in the whole idea of mathematical theories and ultimately in computers and things like this because he went off to MIT where he worked with Marvin Minsky on the whole field of Artificial Intelligence and so on. So he was a very good friend and a very important one and also, because of the fringe left-wing politics that we were associated together.