In class one day, Mr. Johnson pulled Johnny over to his desk after a test, and said, "Johnny, I have a feeling that you have been cheating on your tests."

Johnny was astounded and asked Mr. Johnson to prove it. "Well," said Mr. Johnson, "I was looking over your test and the question was, 'Who was our first president?', and the little girl that sits next to you, Mary, put 'George Washington', and so did you."

"So, everyone knows that he was the first president."

"Well, just wait a minute," said Mr. Johnson. "The next question was. 'Who freed the slaves?' Mary put 'Abraham Lincoln', and so did you.”

"Well, I read the history book last night and I remembered that," said Johnny.

"Wait, wait," said Mr. Johnson. "The next question was,'Who was president during the Louisiana Purchase?' Mary put 'I don't know', and you put, 'Me neither'.”

考试后的一天，约翰逊先生在课堂上把强尼拉到讲台旁边问道：“强尼，我认为你在这次考试中作弊了。”

强尼非常惊讶，要求约翰逊先生拿出证据。“好的，”约翰逊先生说，“我看到你的试卷上有这样一个问题：‘我们的第一任总统是谁？’紧挨着你的那个名叫玛丽的女孩写的是‘乔治·华盛顿’，你写的也是这个答案。”

“当然，每个人都知道他是我们的第一任总统。”

“噢，等一下，”约翰逊先生说，“下一个问题是：‘谁解放了黑奴？’玛丽的答案是‘亚伯拉罕·林肯’，你的答案也是一样。”

“噢，我昨天晚上看了历史书，我记得。”强尼说。

“等等，等等，”约翰逊先生说，“下一个问题是：‘谁在路易斯安娜大收购时期当了总统？’玛丽写的是‘我不知道’，而你写的则是：‘我也不知道’。”