From Zheng Banqiao, a famous painter in Qing Dynasty, the word "Xue" needs to be disassembled. Learning is learning, and asking is asking. People today learn without asking questions. Although they have read thousands of books, they are just a boring person. "
Interpretation: You just don't ask questions on the way to school. Even if you have read many books, you are just a fool.
So don't be a "learn without asking" person!
"Stupid person" means stupid,
"Er" is used as a modal particle at the end of a sentence.