Complex sentence: For a start, it's not relevant whether the summary level articles "have any evidence that this stuff is notable" or not since notabilty is a function of the subject regardless of the adequacy of the article.
Split into simpler sentences: For a start, it's not relevant whether the summary level articles "have any evidence that this stuff is notable" or not. Notabilty is a function of the subject regardless of the adequacy of the article.