Logic & Legal

Student: "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.

Later on 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 25 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."