The point I was making is a separation between bugs due to human error and bugs due to unanticipated environments outside of a particular projects codebase. I d

The point I was making is a separation between bugs due to human error and bugs due to unanticipated environments outside of a particular projects codebase. I don't think it's fair to class those as human error because the actual error doesn't necessarily lie with the developer. You can substitute "manmade" with a better adjective if you wish.