Shirky at his best describes patterns that seem to fly against common sense. Situated Software: “The curious thing to me about Teachers on the Run was that it worked where the Web School version failed. RateMyProfessors.com has been available for years, with a feature set that put the simplistic write/read/vote capabilities of Teachers on the Run to shame. Yet no one at ITP had ever bothered to use RateMyProfessors.com, though the weekend’s orgy of rating and voting demonstrated untapped demand.”