Facebook has said its efforts to reduce false news are working, but declined to provide any underlying data. | Nicholas Kamm/AFP/Getty ImagesFacebook touts its partnership with outside fact-checkers as a key prong in its fight against fake news, but a major new Yale University study finds that fact-checking and then tagging inaccurate news stories on social media doesn’t work., reported for the first time by POLITICO, found that tagging false news stories as “disputed by third party fact-checkers” has only a small impact on whether readers perceive their headlines as true. Overall, the...…Facebook has said its efforts to reduce false news are working, but declined to provide any underlying data. | Nicholas Kamm/AFP/Getty ImagesFacebook touts its partnership with outside fact-checkers as a key prong in its fight against fake news, but a major new Yale University study finds that fact-checking and then tagging inaccurate news stories on social media doesn’t work., reported for the first time by POLITICO, found that tagging false news stories as “disputed by third party fact-checkers” has only a small impact on whether readers perceive their headlines as true. Overall, the...WW…