the events, times, and situations that predict both the occurrence and nonoccurrence of problem behavior are identified, (apbs.org)
First, the proposed law or theory leads us to expect many and varied events that we observe (and we do not observe any events whose nonoccurrence it leads us to expect). (firstthings.com)
The disposition of property upon separation, marital dissolution, death, or the occurrence or nonoccurrence of any other event; (rocketlawyer.com)