A Refutation (n.) done once is no refutation — refuted ideas germinate fastest in the ground of ignominy, so don't befoul what you want gone; respectfully lay it on ice, again and again.
A Refutation (n.) is best done by putting a matter respectfully on ice — persecution only gives it the glamour of martyrdom.
A Refutation (n.) of an opinion now consists in showing it depends on morality — that it was inspired by noble feelings.
A Refutation (n.) of priests and religions is possible only one way: show that their errors have stopped being beneficial — that their "proof of power" no longer holds.
A Refutation (n.) arrives when a friend has talked himself hoarse, and the answer is then I am refuted, let us speak of it no more.