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showed a group of two- and three-year-olds a new game. A puppet then appeared and performed the game incorrectly. Almost all the children protested the puppet’s actions and many explicitly objected, telling the puppet how the game should be played. “Social norms—even of this relatively trivial type—can only be created by creatures who engage in shared intentionality and collective beliefs,” Tomasello writes, “and they play an enormously important role in maintaining the shared values of human cultural groups.” 7
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