When a student failed to solve a math problem in class, he expressed his regret to his teacher. “I remember solving the problem in my dream last night, but for the time being I‘ve forgotten it . What can that mean?”

“It means that you are more intelligent in dreams than when you are awake,”  the teacher explained.

翻譯：

一名學生在班上沒有做出老師的教學題，他感到很遺憾，對老師解釋說：“我記得昨天夜里做夢對這道題解對了，但現在一時想不起來了。這說明什么？”

“這說明你做夢的時候比你醒著的時候更聰明”。老師解釋說。