A: the earth is made of green cheese
B: It is quite obvious that it is not the case that the earth is made of green cheese
A: You're wrong.
B: the earth is self-evidently not made of green cheese .
A: It should be obvious to anyone with half a brain that the earth is made of green cheese .
B: Since you disagree with me, I can only assume you don't know enough about the subject. Go read a book, and don't talk about the subject any more until you agree with my views on it.
A: You're wrong.
MoonShadow/FlameWar