Facebook is ranking user reliability, according to a report Tuesday.

The previously undisclosed ratings systems gives people a trustworthiness grade on a scale of zero to one, the Washington Post reports.

Tessa Lyons, who is leading Facebook's effort to fight misinformation, said the move is part of the social media giant's push to suppress fake news — an issue that came to prominence during the 2016 campaign.

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It is “not uncommon for people to tell us something is false simply because they disagree with the premise of a story or they’re intentionally trying to target a particular publisher,” Lyons told the Post.

One way Facebook judges people is by looking at what, if any, posts they are flagging as false, and therefore determining if these people themselves are trustworthy.

The system is one measurement of behavior among many factors being considered by Facebook to determine users' credibility, but the report stresses it is unclear what the score is being used for and how many people have one assigned to them.

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