As we see the Giant Killer Asteroid of AI plummet towards the Home of the Human Race, it becomes clear that the laws of thermodynamics were incomplete.
As well as the conservation of energy, momentum, mass and spin (oh, ok, angular momentum), we must now add the conservation of Intelligence.
This is made obvious by the ease with which obviously stupid AIs are able to fool humans in the imitation game. The AI did not have to be as smart as the person, it only had to meet them half way.
This works both at the indivual level, and at the group level, and at the academic level (people can use an AI to write a terrible paper that human reviewers will accept) and the investor level (venture capitalists fall over each other to fund companies whose products will lead to the ends of the earth).
This is the existential threat to humanity. Not that the AI will wish to eliminate us as competition - it won't need to, because once it gets anywhere near that level, we will all dimmer than a Toc H lamp
It is already too late to put an end to this.