Wikipedia editors know that the site should not be used as a primary source for research. A librarian, whose name is Philip Bradley, said Wikipedia does not have authority. For a printed encyclopedia, the people writing it have to make sure the information is correct, or they could lose their job. Some people say calling Wikipedia an "encyclopedia" means that people trust it even when they should not trust it. Some librarians, academics, and writers of other encyclopedias do not like Wikipedia as a source of information. Many schools and universities do not accept Wikipedia as a source, except most of them do not want "any" encyclopedias used - they want primary sources instead.