The teacher told Johnny to stay after class. “Johnny I have a feeling that you have been cheating on your tests.”
Johnny denied the accusation and told the teacher to prove it.
The teacher explained, “The first question on the test was ‘Who was the first President of the United States, and Mary, who sits next to you, put down George Washington, and so did you.”
“So what?” said Johnny. “Everyone knows he was the first President.”
“Ah, but the next question was ‘Who freed the slaves?’, and both you and Mary wrote down Abraham Lincoln,” remarked the teacher.
“Well, I read the history book last night and I remembered that,” said Johnny.
“Yes, but the next question was, ‘Who was President during the Louisiana Purchase?'” said the teacher. “Mary put ‘I don’t know,’ and you put, ‘Me neither’.”