The computer scientist Arvind Narayanan explains that just because A.I. is intelligent doesn’t necessarily mean it’s powerful.

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The earnings of independent fuel makers Valero Energy, Marathon Petroleum and Phillips 66 are set to crush the near-record results of the June quarter.

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A new report by a Bay Area start-up called Parse adds details to an incident that has shocked the A.I. world and led to calls for closer government regulation.

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Ezra Klein interviews the Nvidia chief executive Jensen Huang.

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