Microsoft's Bill Gates insists AI is a threat

Humans should be worried about the threat posed by artificial Intelligence, Bill Gates has said.

The Microsoft founder said he didn't understand people who were not troubled by the possibility that AI could grow too strong for people to control.

Mr Gates contradicted one of Microsoft Research's chiefs, Eric Horvitz, who has said he "fundamentally" did not see AI as a threat.

Mr Horvitz has said about a quarter of his team's resources are focused on AI.

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