In modern tongue they're simply called "fact checkers". They love being accompanied by curated search results on social media and search engines, censorship and shadowbans. Every single major platform and many smaller ones now implement these strategies to push narratives and to hide dissenting opinions (and FACTS). We once lived in a world where we allowed voices to be heard and people would decide what to believe based on their own reasoning, deduction, evidence, logic. Now the top results for anything the "fact checkers" don't want you to know will be a "fact check" saying whatever supports their narrative. Thus ensuring the lowest intelligence individuals will blindly take their word for it and get back in line. The term "fact checker" disgusts me. It's directly Orwellian. But I'm more disgusted by the morons that support being spoon fed narratives by big tech companies. You are the death of free speech online.