State your opponent's position more powerfully than they can

From How to Criticize with Kindness: Philosopher Daniel Dennett on the Four Steps to Arguing Intelligently by Maria Popova.

“In disputes upon moral or scientific points,” Arthur Martine counseled in his magnificent 1866 guide to the art of conversation, “let your aim be to come at truth, not to conquer your opponent. So you never shall be at a loss in losing the argument, and gaining a new discovery.” Of course, this isn’t what happens most of the time when we argue, both online and off, but especially when we deploy the artillery of our righteousness from behind the comfortable shield of the keyboard.

Dennett has some suggestions:

In Intuition Pumps and Other Tools for Thinking (public library) — the same fantastic volume that gave us Dennett on the dignity and art-science of making mistakes — he offers what he calls “the best antidote [for the] tendency to caricature one’s opponent”: a list of rules formulated decades ago by the legendary social psychologist and game theorist Anatol Rapoport, best-known for originating the famous tit-for-tat strategy of game theory. Dennett synthesizes the steps:

How to compose a successful critical commentary:

1. You should attempt to re-express your target’s position so clearly, vividly, and fairly that your target says, “Thanks, I wish I’d thought of putting it that way.

2. You should list any points of agreement (especially if they are not matters of general or widespread agreement).

3. You should mention anything you have learned from your target.

4. Only then are you permitted to say so much as a word of rebuttal or criticism.