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.
“Drug prohibition has caused gang warfare and other violent crimes by raising the prices of drugs so much that vicious criminals enter the market to make astronomical profits, and addicts rob and steal to get money to pay the inflated prices for their drugs.”