ceo: ned won 't return any of my messages.
ceo: fire him
the boss: i can't do that.
the boss holding hands out: ned is indispensable.
ceo: what makes him indispensable?
the boss: he's the only one who knows how to fix bugs in our system.
ceo: what system?
the boss: i don't know.
ceo: then how do you know he's indispensable?
the boss: ned told me.
ceo: fire him anyway.
dilbert: ned quit two years ago.