A viral clip of an interaction between CNN reporter Jim Acosta and a White House intern has sparked an intense online debate over whether it was doctored—a harbinger of the polarization that’s likely to follow if manufactured videos known as “deep fakes” become widespread.

The clip, a tweaked version of a video showing Acosta and a White House staffer who attempted to take his microphone at a press conference Wednesday, was posted by Paul Joseph Watson of conspiracy site Infowars as evidence that Acosta acted aggressively. White House Press Secretary Sarah Huckabee Sanders then posted the video on Twitter, saying it backed up the White House’s decision to revoke Acosta’s White House press pass.

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