SAN FRANCISCO — The tech industry is spending billions of dollars in a drive to upgrade today’s artificial intelligence tools into so-called superintelligence, a fuzzy term used by companies like Meta and OpenAI to invoke future software they hope will outperform humans in every way. On Wednesday, a loose coalition of Nobel laureates, policymakers, celebrities and British royalty said that work on the hypothetical technology must be halted.

“We call for a prohibition on the development of superintelligence,” said a public statement with more than 700 signatories, including prominent AI researchers, Prince Harry, former Trump adviser Steve Bannon and the Obama administration’s national security adviser Susan Rice. The ban should be lifted only after “strong public buy-in” and scientific co

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