As we reported earlier, it was learned that Facebook's news feed routinely suppressed conservative news. Now, Recode is reporting that Facebook training documents given to its editors have leaked, and they reveal that editors select trending news topics from just ten editors, only one of which could be considered right-wing.

From Recode

A report published in the Guardian today includes a training document for Facebook editors that outlines how they should curate the "trending" headlines tool. 

Instructions in the documents appear to contradict Facebook's earlier denials of a Gizmodo article that said Facebook editors directly inserted headlines into the trending news widget. It also contradicts what Facebook told Recode last summer. 

The guidelines obtained by the Guardian additionally show that editors must select trending news topics from a list of 10 "trusted" news sources that include the New York Times, BBC News, CNN and Fox News. This is likely to make people who are upset about alleged anti-conservative bias that Gizmodo reported on even madder; Fox News looks like the only right-wing outlet on the list.