Allow you teenage child to think they know everything.
For instance, when they say French Hugueots did not exsist, keep your mouth shut.
I mean tell them they did and then allow the teeanger to argue with you until they tire of arguing with someone who doesn't argue back.
Not particiapting in silly disagreements help the parent/teenager relationship. After all one day they will grow up, become adults, realize how little they actually know and then have teeangers of their own!