Thread:Help talk:CirrusSearch/Subcategory searches via incategory

Does an incategory: search include content that is in articles tagged with subcategories of the category named in the incategory: search?

For example, will a search for incategory: match an article that contains the text "daily" and which is tagged with  , where that category is a subcategory of  ?

Or do I have to list all the subcategories, for example incategory:Extensions incategory:"Search extensions" daily ?