After having failed his exam, a student name Little Johnny goes and confronts his lecturer about it.

Little Johnny:

“Sir, do you really understand anything about the subject?”

Professor:

“Surely I must. Otherwise, I would not be a professor!”

Little Johnny:

“Great, well then I would like to ask you a question. If you can give me the correct answer, I will accept my mark as is and go. If you, however, do not know the answer, I want you to give me an “A” for the Exam.”

Professor:

“Okay, it’s a deal. So what is the question?”

Little Johnny:

“What is legal but not logical, logical but not legal, and neither logical nor legal?”

Even after some long and hard consideration, the professor cannot give the student an answer, and therefore changes his exam mark into an “A”, as agreed.

Afterwards, the professor calls on his best student and asks him the same question.

He immediately answers:

“Sir, you are 63 years old and married to a 35-year-old woman, which is legal, but not logical. Your wife has a 17-Year-old lover, which is logical but not legal. The fact that you have given your wife’s lover an “A”, although he really should have failed, is neither legal nor logical.”