The Cunctator wrote:
The statement " Semantically there is no big difference between dividing an article in subtopics and creating a category with a couple of articles in it," is perfectly true.
The practices being discussed here are very different; I'll let you decide whether the difference is semantic. Neither [[Biology]] nor [[List of subfields of biology]] can properly link to ever biology topic on a Wikipedia. That's why [[List of biology topics]] exist now, of course.
Your idea of letting the software interpret [[List of ...]] as in [[List of biology topics]] is interesting, although Magnus' category code is much further along. Also, [[List of actors]] is a rather different page; it's encyclopedic, whereas [[List of biology topics]], by listing pages in Wikipedia, is /about/ Wikipedia. (By rights, it should be [[Wikipedia:List of biology topics]].) So the [[Category:]] plan can replace [[List of biology topics]] but should leave [[List of actors]] as it is.
-- Toby