A Science Lecture

A famous scientist was on his way to a lecture in yet another university when his chauffeur offered an idea:
- Hey, boss, I`ve heard your speech so many times I bet I could deliver it and give you the night off.
- Sounds great - the scientist said.
When they got to the auditorium, the scientist put on the chauffeur`s hat and settled into the back row. The chauffeur walked to the lectern and delivered the speech. Afterward, he asked if there were any questions. 
- Yes - one professor said.
Then he launched into a highly technical question. The chauffeur was panic-stricken for a moment but quickly recovered.
Then he said:
- That`s an easy one. In fact, it`s so easy, I`m going to let my chauffeur answer it!