Nice. I think this could be nicely used as a tool by the riddle-makers of the "six degrees of separation" quizzes. (Though, not that they would usually need it anyway...) Quite "plastic", anyway, to see it this way. 
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"Should the story say 'he ate bread,' the dramatic producer can only show 'a piece of bread' according to his taste or fancy, but the hearer of the story will think of bread in general and picture it in some form of his own." -On Fairy-Stories
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