reasons why wikipedia is not a good source
Wikipedia:Wikipedia is not a reliable source Wikipedia is not a reliable source. Wikipedia can be edited by anyone at any time. This means that any information it contains at any particular time could be vandalism. Biographies of living persons are especially vulnerable to this issue. Some edits on Wikipedia that are in error are sometimes fixed, however because Wikipedia cannot monitor contributions made by millions of users, there are many errors that remain unnoticed for days, weeks, months, and even years. Therefore, Wikipedia should not be considered a source for 'fact-checking'.
A Dictionary of the English Language Published on 15 April 1755 and written by Samuel Johnson, A Dictionary of the English Language, sometimes published as Johnson's Dictionary, is among the most influential dictionaries in the history of the English language.