Not the original commenter, but I'm guessing they meant two things: 1) You should technically only be editing /etc/sudoers through visudo. 2) You should also

Not the original commenter, but I'm guessing they meant two things: 1) You should technically only be editing /etc/sudoers through visudo. 2) You should also have an admin/root group. All you would need to do then is "sudo adduser <blah> admin/root". This group is the one you specified in /etc/sudoers to have root permissions.