Geoffrey Hinton, who is called the “Godfather of AI,” has left his job at Google because he is worried about the bad things that artificial intelligence (AI) could cause. He helped Google work on AI for 10 years, but now he thinks AI is advancing too quickly and could take away people’s jobs and make it hard to know what’s true. He left Google so he could talk openly about these concerns, even though it might not be good for Google.

Some other people who work in technology also have concerns about AI, like the possibility of chatbots spreading false information and replacing jobs. Hinton’s departure from Google adds to these concerns. Google’s chief scientist, Jeff Dean, said he appreciates Hinton’s work and that Google is committed to being responsible with AI. Earlier this year, some other people in technology called for a pause on training the most powerful AI systems, citing big risks to society and people.