“The Wisdom of Crowds” is one of the driving principles of Web 2.0. The idea, explored in James Surowiecki’s influential book, is that decisions made by large numbers of people together are better than decisions that would have been made by any one person or a small group. This principle has powered the wide adoption and success of tools including including Google, collaborative filtering, wikis, and blogs.
One common technique, following the Wisdom of Crowds principle, is ...