Manual:$wgUseCategoryMagic/de-formal

Details

 * This option is no longer in use; categories are enabled unconditionally.

Should the category pseudo-namespace be used? (Set to true if categories are used, false if category is just another article.) Should on a page associate it with the category Dog? (a link to that category page will be added to the article, clicking it reveals a list of all articles in the category.)