Often when one omits to do a certain thing, one’s omission is due to one’s simply not having considered, or one’s having forgotten, to do that thing. When this is so, one does not intentionally omit to do that thing. But sometimes one intentionally omits to do something. For example, Ann was asked by Bob to pick him up at the airport at 2:30 am, after his arrival at 2:00. Feeling tired and know...