To be precise wikipedia articles I think this is called name space are not allowed to have suppages and not allowed to link to wikipedia pages which are not articles themselves On the other hand talk pages can have subpages and can refer to other talk pages or talk sub pages this is called user space I discovered these rules when trying to find out why the sources page had been deleted And I put links from the main talk page to Literature alongside of that to Arguments So interested editors can find this material For ordinary readers the article has to be self contained