Creating a Kill Switch to Shut Down a Rogue A.I. Is Harder Than It Sounds

A bipartisan group in Congress and Gov. Gavin Newsom of California have floated ideas for building a mechanism that would instantly power down an A.I. system. Only no one really knows how.Creating a kill switch, a metaphorical big red button that could be pressed in an emergency, is harder than many policymakers assume. “There often isn’t one plug you can pull,” said one A.I. researcher.