Tesla chief executive Elon Musk has warned about artificial intelligence before, tweeting that it could be more dangerous than nuclear weapons. Speaking Friday at the MIT Aeronautics and Astronautics department’s Centennial Symposium, Musk called it our biggest existential threat:

I think we should be very careful about artificial intelligence. If I were to guess like what our biggest existential threat is, it’s probably that. So we need to be very careful with the artificial intelligence. Increasingly scientists think there should be some regulatory oversight maybe at the national and international level, just to make sure that we don’t do something very foolish. With artificial intelligence we are summoning the demon. In all those stories where there’s the guy with the pentagram and the holy water, it’s like yeah he’s sure he can control the demon. Didn’t work out.

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