Once upon a time, there was a A Zheng man who wanted to buy a pair of shoes in the market. He first measured the length of his feet and made a ruler. But when he left, he accidentally left his ruler on the stool at home.

He went to the market and found a place to sell shoes. I was about to buy shoes when I found that I had left my ruler at home. I said to the shoe seller, I left my shoe size at home and bought it when I got home. With that, he hurried home.

He ran home in a hurry, took a ruler and ran to the market in a panic. At this time, it was getting late and the market had already dispersed. He made two trips for nothing and didn't buy shoes.

Others know this, feel very strange, ask him; Why don't you try on your shoes with your own feet instead of going home and getting a ruler?

Zheng Guoren, who bought shoes, said, I would rather trust a measuring ruler than my feet.

Moral: People who stick to the rules and ignore the objective reality often do absurd things.