X true is true because my book says so.
The only way you can change their mind is have them specifically tell you what their book says and listen to a contradictory position they hold to it while also putting a lot more effort in describing to them how they are wrong without offending them and them actually taking your critique seriously. Reason doesn't work when someone thinks God is real.
I have found the defeater of this entire forum. It is all a waste of time unless we are friends and know what each other do outside DA so that we can use that as arguments in a way that doesn't offend the other person and they actually consider it.