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Earlier this month, the White House hosted a ‘Social Media Summit’ that served to reframe and distract from serious, hostile manipulation of online discourse. Much ink has already been spilt on the algorithms, business models and human impulses that make the social-media ecosystem vulnerable to disinformation, the purposeful spreading of misleading content. Although the major tech companies are often insufficiently open about, or motivated to fix, the problem, they have begun to take action against what Facebook calls “coordinated inauthentic behavior”.