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: It should be obvious to anyone with half a brain that the earth is made of green cheese .
B: You're quite wrong, all llamas are stripy
A: It should be obvious to anyone with half a brain that all llamas are stripy .
B: You're quite wrong, the moon is flat
A: It should be obvious to anyone with half a brain that the moon is flat .
B: I dispute your premise.
A: ...so?
B: It is quite obvious that it is not the case that the moon is flat
MoonShadow/FlameWar