Moreover, user-generated content
needs to be verifiable by reliable sources such as
links to reputable websites. A peer-reviewed study
by Nature of selected science topics found that the
error rate of Wikipedia and Britannica was roughly
the same. Yet, Wikipedia’s crowdsourcing approach
to display user-generated content is not without criticism.
The most serious are that the content may be
unreliable and unauthoritative, that it could exhibit
systematic bias, and that group dynamics might prevent
objective and factual reporting.”