They say x, ask for where they heard about x. They say from y news organization, ask the source for y. If they say z, if z is actually an actual document or otherwise, ask them where in z does y claim x is true.
If z is just another news organization, keep going until they provide (or don't provide) an actual document. If they can't procure an actual document, send it yourself. If z is just another video cIip, ask them for the whole video. Provide them the entire video if they can't.
Do not try to antagonize. Just simply ask the questions as if you were trying to understand their point of view, to learn something we might not have heard.
that's their usual response to 'facts'. They don't like them; as if they're programmed to shut down/give you the blank stare. they also get angry. Even some of my more alert acquaintances can't deal with logic; scary, but also explains so much.
the people ive had trouble with over the decades (corrupt bosses, co-workers, etc) have ALL been liberals. we just didn't separate & label them, so was hard to see the patten. Thanks to Q for shining a light on it.