Combating the expansive and fast infection of the seep of disinformation into American elections isn’t being “pollyannaish about blood sport in politics,” said Graham Brookie, head of digital forensic research for the Atlantic Council. It’s about being “extremely vigilant about anything that would be potentially misleading.”

Brookie didn’t consider the edited debate video disinformation, but said it walked up to the line. He did, however, call the Bloomberg tweets quoting fake Sanders’ comments “outright disinformation.”

“While a number of consumers might identify it appropriately as satire, you can’t depend on an audience to clearly and coherently consume information,” Brookie said.