Five Cannibals

Five cannibals get appointed as engineers in a defense company.



 During the welcoming ceremony the boss says, "You're all part of our
team
 now. You can earn good money here, and you can go to the cafeteria for

 something to eat. So please don't trouble any of the other employees".



 The cannibals promised.



 Four weeks later the boss returns and says, "You're all working very

 hard, and I'm very satisfied with all of you. However, one of our

 janitors has disappeared. Do any of you know what happened to him?"



 The cannibals all shake their heads no.



 After the boss has left, the leader of the cannibals says to the
others,  
 "Which of you idiots ate the janitor?"



 A hand raises hesitantly, to which the leader of the cannibals
replies,  
 "You fool! For four weeks we've been eating Team Leaders, Supervisors
and
 Project Managers and no one noticed anything, and you have to go and
eat  
 the janitor!"