except we now live in a world with phrases like alternative facts. if someone doesn't want to believe in something because it does not align with their ideals, then you will not be able to convince them regardless of how incontrovertible your facts may be. sure, the more "solid" the fact, the more bizarre the counter is, but there will always be a counter.
And it's not even the 'how many died in WW2' kind of data, but simple public records like 'tax revenue for 2020', 'road accidents in october'.
It's as if being able to find information so easily, has made it less trustworthy. Being flooded with fake and twisted news certainly feels like one of the causes.
there are certain people that whole heartily believe that what the person on their TV is telling them is without a doubt true. anyone trying to convince them otherwise is just part of the opposing forces. even when shown where, for example the fox news hosts, have admitted in sworn testimony the did not believe the big lie and knew it to be false, it is rebutted as fake.
Fake News and Alternative Facts have to be the worst combinations I've ever known. they may even be some of the most dangerous as well.
it's classic cult control. when i was a kid being forced to weekly attendance at my mom's church, it was often heard that you can't go listening to other preachers, reading other books of thought, or similar as that's the enemy's weapon to confuse you and tempt you away. as i got older and actually started paying attention, these things really started sounding like nails on a chalkboard. it wasn't just the one church either.
so by only listening to the one source and ignoring all others, they are actually doing good by what they have been told. those of us reading multiple sources are just twisting in the wind so to speak with no real convictions (or some such as i've been told).
https://en.m.wikipedia.org/wiki/Reflective_equilibrium
One could alter the perception of the "facts" in order to feel comfortable about them.
It's more to show others that they're incorrect for XYZ reasons and to prevent that detritus from accumulating. Over time if you just let them post without counters or some form of moderation eventually it becomes the norm.
The best way to counter any claim is with openness, empathy and the ability to be wrong. That is how you change minds, don't let emotions separate you. Granted that is far easier said then done as I may disagree with someone then they often turn to insults if they think "I've turned against them" because I may have a different opinion. Some people have such high defense you really can't get through to them.