Mathematician George Danzig

When the future mathematician George Danzig was still a student, the following story happened to him.

George took his studies very seriously and often stayed up late into the night. One day, because of this, he slept a little and came to the lecture by Professor Neumann with a 20-minute delay. The student quickly rewrote two tasks from the blackboard, believing that this was homework. The task was difficult, it took George a few days to solve them, he brought the decision to the professor. He said nothing, but a few weeks later broke into George's house at six in the morning. It turned out that the student found the correct solution to two previously unsolvable problems of mathematics, which he did not even suspect, as he was late for class and did not hear the preamble to the problems on the blackboard. For several days he managed to solve not one, but two tasks over which mathematicians had been tormented for a thousand years, and even Einstein could not find a solution for them.

George was not limited to the glory of these tasks as intractable, he just did not know that this was impossible.

Source: https://elims.org.ua/pritchi/pritcha-o-rabote-matematik-dzhordzh-dancig/