After the election, many people blamed Facebook for spreading partisan — and largely pro-Trump — “fake news,” like Pope Francis’s endorsement of Trump, or Hillary Clinton’s secret life-threatening illness. The company was assailed for prioritizing user “engagement,” meaning that its algorithms probably favored juicy fake news over other kinds of stories. Those algorithms had taken on greater prominence since August, when Facebook fired its small team of human beings who curated its “trending” news section, following conservative complaints that it was biased against the right.