When you start talking about the known knowns and the unknown unknowns, you're thrown into a crazy meta-level discussion. Do I know what I know, do I know what I don't know, do I know what I don't know I don't know. It becomes a strange, Lewis Carroll - like nursery rhyme.

I'm asked unendingly to become involved in series involving true crime and as it so happens the Netflix series that I'm working on is about a true crime.

One of the strengths of my interviews is that I really, honest to God, have no idea what people are going to say.

Simply coming to the perpetrator and delivering the message is Nozick's definition of revenge. And in that sense, Adi is exacting revenge. When people ask, "Does Adi want revenge?" - they mean violent revenge. But in Nozick's formulation, it is revenge. That is the essence of revenge.

Nothing is so obvious that it's obvious.

I used to work as a private detective years and years ago.

Twenty to thirty years ago, who was making documentary films? Nobody. Well, relatively few people. It was an art form that had limited theatrical distribution, if any at all. Some television distribution, but relatively small audiences regardless. And in the intervening years it's become more and more popular with a lot of people.