David Marcus: Nobody is checking the social media fact checkers. It's time that changed

The left-leaning American news media’s stunning reversal on whether the coronavirus could have been created in a Chinese laboratory is the latest example of the dangers of fact checking.   

For most of 2020 the supposed arbiters of truthiness insisted that lab leak stories should not be taken seriously and should be suppressed on social media. Just yesterday Facebook finally lifted is baseless ban of the lab leak theory. The real problem here is not that fact checkers got something wrong, it’s that they have the power to censor what journalism Americans see and...