Article: There is a bar with the name "The White Horse ". A picture of a white horse is on the door of the bar. It is Mr. Webster's. Few people go to the bar. One day, Mr. Wilson comes in, drinks a cup, watches the bar, and then says to Mr. Webster, "Few people come here. Take down the picture of the white horse and put a picture of a black horse." "But the name of the bar is 'The White Horse,'" Mr. Webster says. "Yes, but do it," says Mr. Wilson. After that, Mr. Webster goes to a store and says, "I want a picture of a black horse." The next day, a picture of a black horse is on the door of the bar. The next morning, a man comes in and asks, "The name is "The White Horse", but why do you put a picture of a black horse on the door of your bar?" The man sits down and asks for a cup. Then a second man comes in and asks the same question, and then a third man .... Many people come in and say, "The picture on your door is not right." After that, they all sit down and drink in Mr. Webster's bar. Question: What can we know about Mr. Wilson's idea ? Yes or no, is the answer "It is useful."?
No