Deletion of List of United States Presidents by IQ

Comment: as excessive cross-categorization per : we don't have List of United States Presidents by height, List of United States Presidents by weight|weight or List of United States Presidents by hair color|hair colour, for the same reason. There's only one source, and any source on this is speculative at best. It's not a subject that's widely discussed
Stance: delete
Cited policy: Wikipedia:What Wikipedia is not (WP:NOTDIR)