There was an error in Twitter's fact check of Trump's vote-by-mail tweets, underscoring the challenge social media platforms face trying to arbitrate truth.

It was corrected after an elections professional notified the company (and me) about the mistake.https://t.co/bQmfZc8pBm pic.twitter.com/6IoeSzlXpq

— Dustin Volz (@dnvolz) May 27, 2020