The First Amendment forms the bedrock of American democracy. Its protections against government censorship make possible the shared societal debates that have ushered many once-heretical ideas into the mainstream. Yet, as our national debates increasingly occur within the private walls of social media platforms, those companies, exempt from First Amendment restraints, have embraced their newfound role of national censor. As part of this process, fact-checkers are expanding their reach to questions for which there are no clear answers, adding new categories of assessment such as “missing context” to their rulings.