I had a similar realization, and then I realized this is even worse. It's not about being duped. Getting to the truth is a really hard problem. I also suspect

I had a similar realization, and then I realized this is even worse. It's not about being duped. Getting to the truth is a really hard problem. I also suspect at this point there is fault injection. There are actors spreading false information with the intention of catching others believing it. I saw some cases where fact checkers had access to suspiciously hard to get information "disproving" a claim someone else picked up. The kind of information you're more likely to know because you created the lie in the first case. In the specific case I could even quantify the probability that they stumbled on that information (it required a choice from thousands of items, with very low probability of being the disproving item), and it had a very low probability.