Sometimes winning the argument is how you lose the relationship, and losing the argument is how you find the truth.

It is possible to be correct and lose more than the point was worth, and it is possible to give up the point and find out something true. Winning an argument tends to close the inquiry, since once you have prevailed there is nothing left to learn from the other person.

In your next disagreement, try conceding a piece you could have defended. Ask what they see that you do not. The information you get is frequently worth more than the victory would have been.