Kinds of icing
This might be because I spent my entire life in aviation and rarely in a kitchen, but I actually think the difference between the two types of structural icing is easier to explain for me than the difference between frosting and icing, let alone where cream cheese belongs in this equation. On a plane you can only get clear ice, rime ice, or a combination thereof. Of course, then there is induction icing on your carburetor or instrument icing, which I think Chuck was after initially with his question.
But I am very impressed with Chuck in this one. Not only does he know a bit about icing, he really seems to know about cooking and cream cheese as well.