students and teachers !!!

After having failed his exam in "Logistics and Organization", a student
goes and confronts his professor about it.

Student: "Sir, do you really understand anything about the subject?"

Professor: "Surely I must. Otherwise I would not be a professor!"

Student: "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 give me an "A" for the
exam. "

Professor: "Okay, it's a deal. So what is the question?"

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.

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 25
year old woman, which is legal, but not logical. Your wife has a 18 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."