Being an Apple Store "genius" takes more than technical know-how—it takes a company-provided crash course in psychology. Over at Gizmodo, Sam Biddle got hold of the Genius Training Student Workbook, a stunning volume full of stringent rules on how to interact with customers and each other, up to and including which words to use and avoid. "The manual could easily serve as the Humanity 101 textbook for a robot university," Biddle quips. Among the advice inside: