Wikipedia fails for one simple reason; most of the data is without citation and most of the data with citation relies on web links that do not work anymore. The documentation that IS correct has absolutely no attribution and to find out who wrote an article or various portions of it you need to delve into histories or use something like they use to prove that the government is using it for propaganda or companies are removing swathes of information that are disparaging by the IP blocks they're posted from....

Wikipedia's chief failing is lack of citations. Lack of citations and citations with dead links. Dead links and lack of citations. Wikipedia's two failings are lack of citations and citations with dead links...and the documentation that IS correct has absolutely no attribution. Wikipedia's three failings are lack of citations, citations with dead links.... Amongst Wikipedia's failings are such diverse elements as most of the data lacking citations, most of the citations relying on web links that do not work anymore, ....