[wp-hackers] User Roles & Capabilities - How come add and edit aren't separate?

[ErisDS]

Hi All,

Hopefully this is a quick question: does anyone know why the capabilities
aren't divided into edit_posts and add_posts or edit_pages and add_pages?
The capability "edit_posts"/"edit_pages" also permits a user to add new
ones. Is it not a reasonable use case that users should be able to add but
not edit, or edit but not add?

Just wondering!

Eris :)