Is Donald Trump really the only misinformer that Twitter can find?

It’s been more than 24 hours since Twitter flagged tweets by U.S. President Donald Trump, suggesting its users should seek more information about his allegations on mail-in ballots. As far as we know, this is how the company will handle misleading content. What’s interesting, however, is that no other misinformer — on the entire planet — has been detected by the platform. This is just one of the issues Twitter should review soon.

First of all, let’s be clear: From a fact-checker’s point of view, Trump’s tweet has not been...