That said, swearing by a particular "course of action" and thinking it superior to other approaches is a "value" in my opinion.
My apologies if I imputed motives in your question that were not there.
I am curious: what would you do if you were facing a high stakes situation where another person's decision was going to have a material impact on your life? How would you go about trying to change their decision?
Regarding your question: Depends on how much impact on my life it would have, and what exactly the decision is. I have no prepared strategies to change people's minds apart from presenting reasonable arguments and maybe slightly bullshitting my way through it at times. There was never a need for more than that.
In the extreme the response would be lies and even violence, if nothing else works, I suppose. Again, it depends on what the situation and "material impact" on my life is.