the more people doubt their eyes and ears when faced with apparent evidence, the easier it becomes for liars to dispute legitimate proof of their misdeeds, a phenomenon known as the liar’s dividend. Those who hope to avoid accountability for legitimate video and audio evidence can exploit that skepticism. The cry of “fake news” will become the shout of “deep-fake news.” Problems such as declining receptivity to the idea of objective truth—or truth decay—and a growing tendency toward rejecting unwelcome evidence already exist, and a campaign to raise awareness about the danger of deep fakes would only pour fuel on that fire.