Wikipedia has been accused of exhibiting systemic bias and inconsistency; critics argue that Wikipedia's open nature, and favouring consensus over credentials in its editorial process, makes it unauthoritative, and that a lack of proper sources for much of the information makes it unreliable, although the converse of the same argument can also be argued. Some commentators suggest that Wikipedia is usually reliable, but that it is not always clear how much. The project's preference for consensus over credentials has been labelled ""anti-elitism"". Editors of traditional reference works such as the Encyclopædia Britannica have questioned the project's utility and status as an encyclopedia. Many university lecturers discourage students from citing any encyclopedia in academic work, preferring primary sources; some specifically prohibit Wikipedia citations. Founder Jimmy Wales stresses that encyclopedias of any type are not usually appropriate as primary sources, and should not be relied upon as authoritative. Technology writer Bill Thompson commented that the debate was possibly ""symptomatic of much learning about information which is happening in society today.