A special set of editorials published in today's issue of the journal Science argue that social media in its current form may well be fundamentally broken for the purposes of presenting and disseminating facts and reason. The algorithms are running the show now, they argue, and the systems priorities are unfortunately backwards: "Rules of scientific discourse and the systematic, objective, and transparent evaluation of evidence are fundamentally at odds with the realities of debates in most online spaces." This produces what the authors call "homophilic self-sorting" -- the ones who are shown this content are the ones who are already familiar with it. In other words, they're preaching to the choir.