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If you've ever gotten product recommendations on Amazon, you've seen Danny Lange's handiwork. The same goes for Uber's AI that books you a ride. The Danish computer scientist helped build the machine learning platforms that both companies use throughout their operations, from the engineering to the marketing departments. Lange has just done the same at video game platform maker Unity, with the goal of evolving robo characters into more complex and nuanced playing companions than a human could program. Lange doesn't shy away from the oft-hyped term "artificial intelligence"-- provided the machines really do learn how to respond to users' needs.