Here's a good example. This tweet from a respected Dr. is really unfortunate.
"But it’s called the Presidential Alert because Trump has a huge ego. And he loves his intruding into our lives without consent."
https://twitter.com/eugenegu/status/1047562343503122432
He states it as though it's fact. Now many of his 200,000+ followers also think that, if they didn't already.
I might've also believed that if I didn't do the work to look it up.