After an incorrect report spread on WhatsApp, a mob lynched two men in Acatlán de Osorio, Mexico. Fact-checkers came in and tried to uncover the truth of what happened.
A recent goof by the Associated Press indicates that real-time fact-checking still doesn't exactly know what it's doing.
Anatomy of a Fact is a recurring series exposing how the Pacific Standard research and fact-checking process works.
President Donald Trump spoke for several minutes on Tuesday about drug addiction in America. Pacific Standard annotated his speech.