I wanted to be an Olympic champion and I didn't care about the goings-on around me. In my heart and with all of my soul I was ready, willing and I was very able. I had a deadly sense of self-belief. I'd go to another level and say I had a deadly sense of self-conviction where you can say whatever you want, you can do whatever you want but you're not going to touch me.

That is true. That one little corner of South Africa, Port Elizabeth and its immediate surroundings, is a region that I know like the back of the hand that holds my pen as I write about it. I can stand on a street corner in Port Elizabeth, look at anybody and put together some sort of biography. I know where they come from, where they’re going. I have a feel of the textures of their life. If I stand on a street corner in New Haven, which is a place I’ve gotten to know as well as any place outside of South Africa, I am still at a total loss to identify the people passing me on that street.

My most important rule is one that sums up the 10: if it sounds like writing, I rewrite it.

I have followed that advice - with, I confess, occasional lapses not only at home, but in the places I have worked, even in relating to my colleagues at the Supreme Court. It is important to be a good listener if you are to work with others effectively, but it also pays, sometimes, to be a little deaf - for example, in my current position, when a colleague, academic commentator, or journalist writes that an opinion on which I labored endless hours, worrying over every word, is "sloppy," "smug," "strange," or "profoundly misguided." I am making none of those up.

AI without validation is too unreliable to be of use in any serious application.

My parents tell me I was fascinated by numbers even at age two, when I tried teaching other kinds to count using number blocks.