Two designations of homicide that carry no criminal punishment are justifiable and excusable homicide. However, there are still three basic categories of homicide&colon; justifiable, excusable, and criminal. No necessity is excusable which is avoidable. A coroner's inquest jury ruled the death "excusable". Additionally, all delays are either excusable or non-excusable. Both excusable and non-excusable delays can be defined as either concurrent or non-concurrent. But this was more excusable than some of Veblen's personal affairs. These rules regulated ventilation and made asbestosis an excusable work-related disease.