Humphrey wanted to become a doctor. So, one day, he wore a black coat and put a signboard saying “Doctor Knowall” outside his home.
One day, a rich man was robbed of his money. He went to Doctor Know-all and said, “Since your name is Doctor Know-all, you know who robbed me! Please come to my home for dinner tonight.” At dinnertime, the servants started serving the food. Seeing the first servant, the doctor said, “Oh, good! Here comes the first!” This scared the servant, who was actually one of the robbers.
The same thing happened with the second servant, who was the other robber. Thinking that they have been caught, the servants fell on their knees and apologized and returned all the stolen money. Everyone praised Doctor Know-all’s intelligence!