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Do you really think all those helpful "live chat" offerings that are popping up on e-commerce sites have call centers full of actual people behind them 24/7? Even bots that have fairly sophisticated AI (Artificial Intelligence) behind them can be tripped up without too much trouble, while less-sophisticated ones, like the Amazon Alexa, are so limited that playing with their limitations can make a great game for children. The big difficulty with chatbots, AI, and machine learning is that AI isn't very intelligent at this point -- unless the device has been built, a la IBM's Watson, with a nearly unlimited budget. Microsoft built Tay to interact with young people on their own terms.