Self referential dialogues, add to that a father who defends cigarettes and tries to be the "role-model" for his son, phew!!! I would say tough job and definitely principled negotiation turned on its head!!! Let me make my point on self-referential dialogues - clear (like GNU!!!).
Nick Naylor (NN): What about lobbyists? (in a lecture to 3rd graders)
Kids: What do you talk about?
NN:I speak on behalf of cigarettes.
Kid:My mom used to smoke, she says cigarettes kill!!!
NN goes on to refute the kid's argument by saying that her mom is not an expert, then he says -
NN:There will always be people trying to tell you "what to do" and "what to think". I am here to say that when someone tries to act like some sort of an expert, you can respond "who says".
Now this response undermines the authority and hence the dialogue. But imagine if these kids respond "who says" and that's where GNU comes in, for information GNU is self referential - GNU Not Unix. Anyway I am high on gas, enjoy this piece of great film making.