Artificial intelligence was one of the biggest topics during Stephen Hawking's Reddit AMA (Ask Me Anything) earlier this year. So it's not too surprising that Hawking used up a significant portion of his answers to that Q&A session, released by Reddit yesterday, by clarifying his stance on dangerous artificial intelligence. "The real risk with AI isn't malice but competence," he wrote to a teacher who's tired of having the "The Terminator Conversation" with his students -- that is, explaining away the notion that evil, killer robots will be the main danger with AI. "A superintelligent AI will be extremely good at accomplishing its goals, and if those goals aren't aligned with ours, we're in trouble." Hawking previously warned that AI could "spell the end of the human race," and he also joined Elon Musk and other notable technologists to call for a ban on autonomous weapons.