We all have times when we go home at night and pull out our hair and feel misunderstood and lonely and like we're falling. I think the brain is such that there is always going to be something missing.
“It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.”