Whoever talks most in an argument is handing out free information.

Talking gives things away. Every extra sentence contains what you want, what worries you, what you have already decided and where you would bend, and the quieter person is simply collecting it. This is why nerves are expensive in a negotiation: the silence feels unbearable and you fill it with your own position.

In the next conversation where something is at stake, say your piece and stop. Let the gap be theirs to fill. Ask a question rather than adding a reason, and notice how much more you learn than you give.