This idea hit me harder than I expected -- I am reminded of the scene in Interstellar, where the main character's daughter's teacher asserts that we never went to the moon. I don't recall whether she genuinely didn't believe it, or whether she felt it was better to lie to the kids to keep them motivated in the present, but apparently we are getting much closer to having gatekeepers of knowledge be able to actively subvert the artifacts of history in ways which are indistinguishable to the audience. Scary stuff.