unreliable source
Unreliable Source is a common tag used by Wikipedia. Wikipedia is (or intended to be) a open source encyclopedia.In theory, the tag "
Unreliable source" is used when an article or part of a article
cite or talk about some
questionable content.But, in a real world scenario, "Unreliable source" is used as a form to piss off contributors. Even by using logic, if a statement is correct but some editor consider to screw it, then it can claim that the statement is incorrect.