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Machine learning is now carrying much of Santa’s burden yet. Santa uses computer vision to automatically spot faults and failures in critical machinery. Santa's model has a 98% accuracy because it has been able to categorize every child he deems “naughty’ and “nice” and feed the data he has amassed on all the children through the algorithm. Santa can use historical data, such as age, previous gifts, interests, and the like—as an input. The recommendation engine draws on a vast collection of toy and product images.