Wikipedia Knows Nothing

What does the Wikipedia know, and how can it know it? More to the point, how can anyone using an anonymously edited source, the contents of which change on a daily basis, know that what they are reading constitutes knowledge? In this provocative challenge to contemporary concepts of objectivity, four figures of knowledge - the Wikipedia, scientific experiments, anonymous peer review, and school education - are investigated in order to question the way we understand the world around us.