" How would it be," she asked them coldly as they left the classroom [Prof Binns, History subject], "if I refused to lend you my notes this year?" "We'd fail our O.W.L.s," said Ron. "If you want that on your conscience, Hermoine..." "Well, you'd deserve it," she snapped. "You don't even try to listen to him, do you?" "We do try," said Ron. "We just haven't got your brains or your concentration -- you're just cleverer than we are -- is it nice to rub it in? "