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Most people see a food delivery robot rolling down the sidewalk and simply walk around it. But one Philadelphia woman decided she wasn't moving. She stood directly in front of an Uber Eats delivery robot, refusing to let it continue. Police eventually arrived, and the 78-year-old retired professor ended up in handcuffs.

Her protest has now sparked a much bigger conversation about robots taking over human jobs and how much space these machines should get on our sidewalks. And there's a surprising detail about Pennsylvania law that makes this whole situation even more interesting.

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