Can this rogue fact-checker make a difference on Twitter?

Behind the wave of wildly popular science and history social media feeds, such as @DoYouScience, @oldpicsarchive, and @ScienceAllDay, there is a rogue fact-checker calling out the fakes. Paulo Ordoveza tweets at @PicPedant, an account he uses to challenge mislabeled, fraudulent, and PhotoShopped images that go viral.
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