Last week, NBC reported on a leaked internal demonstration app from Twitter showcasing one of the company’s ideas for fact-checking elected officials. Tweets by public figures that are contested by fact-checkers, journalists and even ordinary users would be visually flagged with large bright orange warning boxes proclaiming that the tweet is “harmfully misleading” and linking to statements countering it. While the company emphasized that the demo app was merely one of many internal ideas under consideration and there are no immediate plans to roll it out, a closer look reminds us just how much power Silicon Valley increasingly wields over the future of “truth.”