Wikipedia:Clear criteria
 | This is an essay on the WP:Listcruft policy. It contains the advice or opinions of one or more Wikipedia contributors. This page is not an encyclopedia article, nor is it one of Wikipedia's policies or guidelines, as it has not been thoroughly vetted by the community. Some essays represent widespread norms; others only represent minority viewpoints. |
A list that does not have specific criteria may lead to confusion about what belongs and what doesn't. As such the list is unencyclopedic and does not belong in Wikipedia.