• Teacher: Do you at least know the river which flows through Cairo?
• Vitus: No idea. But I could look it up in an atlas for you.
• Teacher: Thanks, but I know the name of the river.
• Vitus: So teachers always know more than their students?
• Teacher: Yes, that’s usually the case.
• Vitus: In that case, do you know who invented the steam engine?
• Teacher: Of course I know that. It was James Watt.
• Vitus: And why didn’t his teacher invent the steam engine?

— From the movie Vitus (2006)