Student: Sir, Can I ask you one question?

Professor: Yes.

Student: If you can answer this question, I will accept my final marks, if you cant, you will have to give me an "A" grading.

The Professor agreed.

Student asked: "What is legal but not logical, logical but not legal and neither legal nor logical?"

Prof thought about it for hours and pondered, but couldnt think of an answer.

He had to finally give up as he really didnt know the answer. He gave this boy an "A" grading as promised.

The following day, Professor asked same question to his students. He was shocked when all of them raised their hands.

He asked one student.

He answered:

Sir, you are 65, married to a 28 years old woman, this is legal but not logical.

Your wife, is having an affair with a 23 year old boy, this is logical but not legal.

Your wife's boyfriend has failed in his exam and yet you have given him an "A", this is neither logical nor legal.