The law student

A student failed in law and
decided to make a deal
with professor.
Sir, do you know
everything about law?
Professor: Yes.
Student: If you can
answer this question, I
will accept my final
marks, if you can't, you
have to give me "A".
The Professor agreed.
Boy asked, "What is legal
but not logical, logical but
not legal & neither legal
nor logical?"
The Professor thought
about it for hours &
pondered but no answer.
He finally had to give up
as he really did not know
and he gave the boy an
"A".
The following day,
professor asked same
question to his students.
He was shocked when all
of them raised their
hands. He asked one
student.
The student answered
"Sir, you are 65, married
to 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."
The professor collapsed...