In this Tuesday, Oct. 4, 2016, file photo, Google CEO Sundar Pichai speaks during a product event in San Francisco. Pichai has declared artificial intelligence more important to humanity than fire or electricity. And yet the search giant is increasingly having to deal with messy people problems: from the need for human checkers to catch rogue YouTube posters and Russian bots to its efforts to house its burgeoning workforce in pricey Silicon Valley. (AP Photo/Eric Risberg, File)
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