Thread:Help talk:Selecting pages/Non-existing pages

Am I correct in saying that this page (and related) doesn't say how to to make queries list (only) non-existing pages i.e. red links, nor whether it's impossible? Or is it implied somewhere I'm not seeing? Perhaps it's implied somewhere that a page must exist for a semantic property to be declared about it?

Example: I want to make a list like http://wikipapers.referata.com/wiki/List_of_authors, but for pages which don't exist.