These considerations may help towards the understanding of a second class of cases, namely forms of implicit address shading off into unaddressed formulas.
Unaddressed junk mail The Post Office now deliver a lot of this with the post.
But, left unacknowledged and unaddressed, these issues become festering sores in the relationship between VS and the rest of the industry.
Keep a repair kit on hand to solve small rips and runs as they occur, because they will only get bigger if unaddressed.
Any details left unaddressed will provide a convenient excuse for the alcoholic and addict, especially if he feels ambivalent about seeking help.