The late New York Senator Daniel Patrick Moynihan put it this way decades ago: “Everyone is entitled to his own opinion, but not his own facts.”

To researchers who have studied moderation efforts and platforms, it’s the most recent move toward a more freewheeling and unbridled social media environment.

Meta’s shift away from fact checking will require changes for the billions of people who use Facebook, Instagram and Threads. Here’s how they can tell truth from fiction.