I had a flag declined for this reason:
This answer does not add anything constructive to existing answers. – muru 22 hours ago declined - flags should not be used to indicate technical inaccuracies, or an altogether wrong answer
As I understand, late answers which don't add anything constructive are deleted, and this answer does not add anything (
gksudo gedit /etc/environment is already present in the accepted answer). I used a moderator flag because a low-quality one was already declined. I believe I am right in flagging that answer. Do we no longer delete such answers?