Two nuns, one known for her skill in math (M) and the other
known for her skill in logic (L), were walking one dark
night far from the convent when they noticed a man
following them.

M: Have you noticed that a man has been following us for
the past thirty-eight and a half minutes? I wonder what he
wants.

L: It's logical. He wants to rape us.

M: Oh, no! At this rate he will reach us in 15 minutes at
the most. What can we do?

L: The only logical thing to do of course is to walk
faster.

M: It's not working.

L: Of course it's not working. The man did the only logical
thing. He started to walk faster too.

M: So, what shall we do? At this rate he will reach us in
one minute.

L: The only logical thing we can do is split. You go that
way and I'll go this way. He cannot follow us both.
So the man decided to follow the logical sister. The
mathematical sister arrives at the convent and is worried
about what has happened to her fellow nun. Then the logical
sister arrives.

M: Sister Logical! Thank God you are here! Tell me what
happened!

L: The only logical thing happened. The man couldn't follow
us both, so he followed me.

M: Yes, yes! But what happened then?

L: The only logical thing happened. I started to run as
fast as I could and he started to run as fast as he could.

M: And?

L: The only logical thing happened. He reached me.

M: Oh, dear! What did you do?

L: The only logical thing to do. I lifted my dress up.

M: Oh, Sister! What did the man do?

L: The only logical thing to do. He pulled down his pants.

M: Oh, no! What happened then?

L: Isn't it logical, Sister? A nun with her dress up can
run faster than a man with his pants down.