Board Thread:Wiki Discussions and Support/@comment-2140588-20150318152949/@comment-3279282-20150320131530

See how it would be if we'd follow that logic? We need a common denominator and usually, that is the manga. Everything that's manga (+ databook, ofc) is canon. Everything else isn't. If something that isn't canon gets references in the manga, it becomes canon. If something that wasn't canon becomes canon, it doesn't make other stuff canon as well.