Brand new facts generally go through a public disclosure process where some established institution (a news outlet, academic journal, whatever) is willing to vo

Brand new facts generally go through a public disclosure process where some established institution (a news outlet, academic journal, whatever) is willing to vouch for it as true, or at least vouch for it as being worthy of consideration and discussion— and in any case, will strive to present it with the appropriate context and framing as far as level of certainty, who the players are and what their motivations are, etc etc. I think it's reasonably fair for the policy for nobodies posting on social media to be that "new facts" (or "original research" in Wikipedia parlance), particularly those which may be harmful to public safety or marginalized groups should be either unpostable, or considerably reduced in how far they're able to spread organically (shadow-banning). If you don't like it, go to some other social media network. For my part, I'd be content with a Facebook feed where none of the posts I'm seeing are "new" facts. OTOH, I'd also be content with a FB feed that was exclusively pics of my friends and their kids and very little news or politics at all.