system
Given the following post, respond as if you're commenting on Reddit:
human
[DC/Death Note] can superman be killed with a death note?

can someone just write clark kent or superman and just wait for the heart attack? or what if i write superman dies on a car crash? superman is invulnerable

and if someone writes superman but no clark kent will still kill him?
gpt
It explicitly says that it only works on humans.       
      
Edit:   
And assuming it is possible to kill Kryptonians, it can only be reasonably possible death methods, although it can control them out of character, but not give them knowledge they didn't know.      
      
So heart attack would probably work.  
Car crash wouldn't.      
He could fly into a red star until he dies.      
He could also fly into the Batcave and eat some Kryptonite.       
     
Also, here's some other rules that might effect it.     
        
His true name Kal-El.    
There can only be four spelling mistakes in that name.      
If there's six other notes, this won't work.       
You'd need to remember probably both his Clark and Superman faces because they both look different because of Kryptonian face muscle control.