During work, David and Michael were chatting:
David: Michael, I've been attending night classes for 5 months now and I have an exam next week.
Michael: oh!
David: For example, do you know who is Graham Bell?
Michael: No
David: He's the inventor of the phone in 1876; if you take night Courses you would know this.
The next day, the same discussion took place:
David: Do you know who Alexander Dumas is?
Michael: No
David: He's the author of "The 3 Musketeers", if you take night courses, you would know this.
The next day, once again:
David: And do you know who Jean Jacques Rousseau is?
Michael: No
David: He's the author of "Confessions", if you take night courses, you would know this.
This time, Michael got irritated and said: And you, do you know who is Wyatt?
David: No
Michael: He's the guy roaming with your wife!! If you stop night courses, you would know