This might not be the usual way to look at communication theory, but we could explain this phenomenon from a religious point of view as well.
Several religious scripts mention that words and their meaning were taught to men by God. It is said that Adam was not aware of the names of various objects until God taught him. And it is emphasized that God has knowledge of all things and man's knowledge is limited to what God wants him to know.
I think communication theory and religion are very interesting. It's something that ought to be looked into further in my view.