Isn't it funny that whenever we have a shred of doubt in answering a question, we have a tendency to repeat the word twice in order to clear things up? for example: Q:--when are you going home? (ambiguous... san luis obispo home, or danville home?)
Q:--what time will you be done with your work? (ambiguous... job work, school work, or just-for-fun work?)
A:--which work... work work?
Really though, now you'll notice it everywhere, and you'll realize that there is really no reason that repeating a word should offer any insight or enlightenment. But somehow this little echo usually renders the desired clarification -- how very, very strange. strange.
All this talk of echos makes me want to leave my work work and go out and explore some caves.