User blog comment:Martialmaniac/Sources external to the manga and Nen types/@comment-32818639-20190917190656

Frankly, this criticism comes primarily from half a dozen users of Reddit and guide/databooks are supposed to be trusted and used since they carry the author's name and are official. If there is a information gap these books can be used, absolutely. I agree that the cards should not be trusted and are mostly trivia.

Remembering that articles are not subdivided into "tabs" in this wiki, to transfer the information from their current positions to the trivia section would transform the current compact and self-explanatory formatting into extra large paragraphs on each page (and some pages are still overcrowded despite the attempt to turn some things into notes recently).

In practice I could agree with:
 * Color code things with purple if they are from the books or anime. But eye and hair color is already accompanied by (1999), (2011), or (Manga) so no color is needed.
 * "Where that information is contradicted by the manga, it should be removed from the template and only mentioned in the trivia."
 * "Information from card games and such should appear in the Trivia section only, if at all."

About "Gon's age in the manga contradicting his date of birth in the databook can be mentioned in the Trivia", what will happen will be the creation of a large paragraph on an already crowded page to explain something that is already explicit much more compactly.