Adam: I rode a hoverboard!
Teacher: Okay. Odd thing to say when we're talking about mitochondria, but, since you brought it up, I feel obligated as your science teacher to inform you all that hoverboards aren't real.
Adam: Well, that's your opinion.
Teacher: No, that's the opinion of gravity.
Adam: It's a grey area.
Teacher: Couldn't be clearer.
Adam: Well, we can agree to disagree.
Teacher: No, we can't.