Clickbait title, and article.<p>There's a "some circumstances" in the original paper. Do we live in those circumstances? Who knows? The paper is entirely game-theoretic and does not supply numbers for the circumstances in which fact checking increases fake news, not do the authors speculate on whether we live in such a circumstance.<p>I may be wrong, but the "fake news" here isn't Facebook style propagandistic lies, or even Trump style anything he doesn't like is fake news. It's just politicians lying.<p>One has to wonder about Tabbarok's motivation in writing a gloss with this title.