A: all crows are stripy
B: all crows are self-evidently not stripy .
A: You're wrong.
B: Sir, you are a buffoon.
A: You're quite wrong, all crows are stripy
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.
B: It is clearly not true that calling people names is unacceptable .
A: The evidence clearly shows that calling people names is unacceptable .
B: I dispute your premise.
A: The evidence clearly shows that calling people names is unacceptable .
B: I don't know of a better way to put it: you're wrong.
A: The evidence clearly shows that calling people names is unacceptable .
B: ...so?
A: You're quite wrong, the earth is made of green cheese
B: It is not evident that the earth is made of green cheese .
A: You're wrong.
B: ...so?
A: 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.
B: The evidence clearly shows that calling people names is unacceptable .
MoonShadow/FlameWar