For simplicity's sake, we'll use the "The sky is blue" fact. (Put aside that we all know that sometimes the sky is not blue, lol).
So we have a post that "The sky is Blue" and everyone is like "yep, yep, the sky is blue." Then you get that one person who comes in and says:
"Well you think the sky is blue, but it's not really--that's just what they want you to think. It's really orange. Oh I know, I know, you can look out your window and see this mirage of blue, I can too, but my research and sources know better and the sky is really orange." I guess that's a conspiracy? Hard to ignore for me but I'm trying.