Story 43-To sell the cow(卖牛）

An old man is selling a big cow. A young man comes to the cow and begins to look at it carefully. Then the old man goes up to him and whispers:"don't say anything about the cow before I sell it, then I will give you some meat."
"All right," says the young man.
After the old man sells the cow, he gives the young man some meat and says, "now you can tell me how do you think of the broken leg of the cow."
"I didn't find the broken leg," says the young man.
"Then why did you look at the cow carefully?" Asks the old man.
Then the young man answers, "because I have never seen a cow, and I wanted to know what it looks like."