Machines could start thinking like humans as early as 2025.

It's very feasible that computers could gain consciousness by 2025, perhaps even earlier in 2020.

"Google's DeepMind isn't there yet, but really I'm sure they'll probably discover those things along the way, and by 2020, it's possible their computer could be superhuman and could be conscious," he said. "That could be the beginning of the end, really."
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