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.
“Consideration of any kind are a crime against the German people and the soldier at the front.”
“Most New Yorkers want to look amazing, and they want you to understand that they look amazing, but they also want you to stop staring at them.”