Ethan Mollick is considered one of the leading experts on the emerging world of generative AI, jobs and the economy, but you might not think so if you take his word for it.

"Leading is not that far a lead as an expert," he told CNBC's Sharon Epperson at the CNBC Workforce Executive Council Summit in New York City on Tuesday.

The Wharton School of the University of Pennsylvania professor, who says he has counseled everyone from Federal Reserve Chair Jerome Powell to Jimmy Fallon on the new world of gen AI, shared a blunt message with human resources officers in attendance at the CNBC event. "I can tell you, no one knows anything," Mollick said.

That includes, he says, the top AI research labs when it comes to the job market and use cases. "They don't know what it's useful for. They tell

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