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.
“I mean, I'm a conservative. I believe that, you know, if you borrow too much, you just build up debts for your children to pay off. You put pressure on interest rates. You put at risk your economy. That's the case in Britain. We're not a reserve currency, so we need to get on and deal with this issu”