You don't have to win this one
What winning costs you
I've argued the mechanism. This chapter is the bill, and you've been paying it while feeling that you'd won.
The evenings. Every win on the list from chapter 1 has a column next to it for the hour after, and the column reads the same way down. A year of that is a lot of evenings spent in the temperature that follows a calendar.
The spiral. Each win adds to your partner's picture of you as the one who has to be right, and Kennedy and Pronin's finding is that the picture drives their moves, which drive yours. You're not just paying for tonight's argument. You're funding next week's.
The withdrawal. Christensen and Heavey's withdrawers weren't agreeing. They were leaving. A partner who's withdrawn from enough arguments withdraws from the subjects, and then from offering views, and then from the conversation, and you'll notice that they've gone quiet and not connect it to the calendar.
The decline. Finkel's control couples declined in marital quality across two years for no reason anyone could point to, and the mediator was conflict distress. Every win is a small deposit of that.
The things they stop telling you. A person who'll be corrected doesn't offer. They stop mentioning what they remember, in case it's wrong. They stop suggesting routes. They stop telling you what their mother said, because you'll dispute it. The information you were fighting to have right dries up, because the source has learned what happens to it.
The things you're wrong about. This is the one people miss. A partner who's stopped arguing has stopped correcting you too. The facts you're wrong about, and there are some, stand, because the person who could correct them has learned it isn't worth it. The habit that was meant to keep the house accurate has made it less so, by silencing the only other witness.
And the version of you they know. You know yourself as someone who cares about the truth. They know someone who has to be right. The second version is the one at the table every night, and it's the one your partner describes to their sister, and it isn't who you meant to be.