“There's no regret. You can't regret. I mean, I've felt regret but I've also refused to allow regret to sow a seed and live in me because I don't believe it. You feel it, it's like guilt, it's like jealousy, it's like all those horrible things. You've just got to snip them and get them out, because t”

“But the need for conflict to expose prejudice and unclear reasoning, which is deeply embedded in my philosophy of science, has its origin in these debates.”