::::::#All three of the year categories reflect facts in the article and help users navigate. What is the problem here? 
 ::::::#No, you've misunderstood me. I don't want the article to be in any broader topics that the article is already more specifically in; the "but that specifies literature" part makes the category more specific, and avoids the redundancy. 
 ::::::#This fact is suppported by sources, as I have stated above. That a particular word does not appear in the sources does not mean that that word cannot appear in the article. 
 ::::::#I am answering your point; the issue for "Category:Works about rape" is the same as for "Category:Child sexual abuse in literature"; neither of these categories is a parent category or subcategory of either of the other categories, therefore neither of them is redundant. 
 ::::::#It would appear that we disagree on the limitations of this category. Perhaps we should request a third opinion on the subject.