When management determines exactly how every task is to be done. . . And can impose its own rules about pace, output, quality, and technique, the sociologist Robin Leidner has noted, "[it] makes workers increasingly interchangeable. " The management no longer depends upon the talents or skills of its workers — those things are built into the operating system and machines. Jobs that have been "de-skilled" can be filled cheaply. The need to retain any individual worker is greatly reduced by the ease with which he or she can be replaced. Which best describes the type of evidence presented in this excerpt? analogical anecdotal statistical testimonial.