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If you believe Elon Musk—though, honestly, why would you ?—he is going to build eleventy billion humanoid robots that will do literally everything , ushering in an unprecedented era of ...

By � Tony Leys �for KFF Elisabeth Yoder’s son, Darragh, was 15 months old in August when he developed what at first looked to his parents like hand, foot, and mouth disease. The common�