One of the important traits to being a successful manager (/negotiator) is to know which battles to pick and which to concede. Once you are able to make that judgment, you have half the battle won.
You don’t have to always prove you are right, especially when it does not matter in the grand scheme of things. If you are able to achieve the final goal without fighting tooth and nail, you have come out victorious. That is what is referred to as a win-win situation. You concede things that don’t matter, but gives your opponent a sense of victory. The importance being on the word ‘sense’ and not ‘victory’.
You are all probably wondering why I am posting this, but I will explain this in a week or two, depending on how things turn out.