In the article Death of an Expert Witness by Maria Bustillos, author talked about Wikipedia and how its works.  Wikipedia is based around a strong hierarchy between experts and everyone else, experts do primary research. They look at the actual stuff. Wiki-editors do secondary research. They read the sources that the experts write and debate the meaning of those sources. As myself doing my final project on editing the Wikipedia pages, so this article was really helpful and pretty impressive. I learned that every statement in a Wikipedia article has to be backed up with a citation to an article or book produced by a journalist, an academic, a scientist, or some other expert who has carried out primary research.