What are the criteria for considering a source "canonical"?
Just check the list
If it is not listed here at the Canonical sources It doesn't count.
- Right, but what's the criteria by which sources make the list?
It goes by The Great Superman Book and a few additions that The Great Rao aka Macduff added and one that was voted by the fans (DC Comics Presents).
Why is Justice League of America not on this list?
This seems arbitrary especially considering he had much more impact in Justice League of America then he ever had in Black Lightning. Who thought this up??? Super Monkey of Earth-2 12:37, 17 December 2006 (EST)