I think attributing blame to a single place can be difficult in complex situations. It's a set of failures in a system that all had to happen for the failure t

I think attributing blame to a single place can be difficult in complex situations. It's a set of failures in a system that all had to happen for the failure to occur. https://en.wikipedia.org/wiki/Swiss_cheese_model https://en.wikipedia.org/wiki/Swiss_cheese_model