As a historian, back when all this internet stuff was starting, we wondered how much of history would ever be true in the future when everything could be changed, and nothing could be checked. But let me quote from Bob Dylan's liner notes to the 1992 release of World Gone Wrong.
... what's essentially true is virtual reality. technology to wipe out the truth is now available. not everybody can afford it but it's available. when the cost comes down look out!