“A man convinced against his will, is of the same opinion still.”
-Dale Carnegie
This is a life lesson. You can’t change the mind of grown folks. If they’ve decided something is a fact, no amount of your argument will make them see reason. Even if it is something that you know for absolute certain, you cannot change how someone accepts or responds to it. Most often, people do not like the truth. As the character said in “A Few Good Men,” they can’t handle the truth! It usually takes the facts smacking them in the face and even then, some folks will still disagree. Or for many people, it is that they know everything and you don’t know what you’re talking about. Say what you need to say then get the hell out of the way. Don’t go back and forth trying to bring them over to your side. Not only for your sanity, but also so that you’ve done what you should have done to try to help them, to warn them, to educate them. No matter how serious or trivial, you cannot change someone’s mind who’s decided something is true and despite your best efforts, some folks have a need to learn things the hard way. When and if they ever figure out that you really knew what you were talking about, they’ll either acknowledge it or they won’t but it shouldn’t matter to you either way. You simply had a job to do and you did it. Say your piece and pray they get it.
