The Voice campaign is being subjected to so much disinformation that it could have planted doubts in the minds of a majority, says academic Tyson Yunkaporta, who studies disinformation landscapes and how they propagate. “It could be enough to make half the population uncertain enough to vote no, because they’re not quite sure,” he says.

“Disinformation is the greatest existential threat, because it’s a force multiplier for catastrophic risk,” says the senior lecturer in Indigenous knowledges at Deakin University and author of a new book on the subject of disinformation: Right Story, Wrong Story.