I like the Colbert quote "Reality has a well known left leaning bias". Whenever I present any evidence in support of climate change being real, or covid deaths being underreported (all pandemics in history, literally, have under reported deaths), or the efficacy of masks, my source is suddenly biased and I've been duped, and the other person shows me a you tube video with doctor oz telling me I'm wrong, then I get a "well you have your sources and I have mine".
It's hard to have discourse with people when we can't even agree on reliable sources, no common ground. With no common ground it's basically not even worth trying to discuss things. It just stops with "that's not reliable", both people think they are right but usually one actually is. Its a dead end.