How much stress do you suffer from trying to prove who's right and who's wrong about something?
Does any of this help your work or business? What does stress do to your body? Do fights create, or use your time and money?
Would you prefer a different way of being? If so, practice these magic words “interesting point of view” every time you find yourself having a difference of opinion with someone.
You're not saying anyone is right or wrong. You're acknowledging everyone has a right to their own (perhaps insane) point of view, including you.
Say it lightly, smile and move on, for example “Yes, I see, thank you. That's a really interesting point of view. I wonder what would be the most rewarding outcome for our business right now? What else could we look at?”