Originally posted by -Pr-
if it's referenced in a post crisis comic, then yes, i don't see why it wouldn't be.
Well in accordance to this rule. I did some digging and I found at least 3 retcon feats from pre crisis era
Superman can cut a diamond planet
Superman "Hulks up" too
You have seen Superman turning coal into diamond but have you ever seen Superman BREAKING DOWN MOLECULES AT SUPER SPEED TO TURN DIAMOND INTO COAL?
Here is the retcon evidence mentioned in modern era Action Comics 650
http://i647.photobucket.com/albums/uu200/biensalsa/Superman/Pre-crisis%20retcon/RETCON.jpg
http://i647.photobucket.com/albums/uu200/biensalsa/Superman/Pre-crisis%20retcon/RETCON2.jpg
http://i647.photobucket.com/albums/uu200/biensalsa/Superman/Pre-crisis%20retcon/RETCON3.jpg
The events happened in JLA V1 96-97-98, 121, 183-184-185
Issue 96 mentions at least TWO events from past issues, So technically those two issues will count as well