I'm not sure how this is a koan [1]. It's a clever turn at the end of the story, but I'm pretty sure I understood the meaning through rational thought. Am I mis

I'm not sure how this is a koan [1]. It's a clever turn at the end of the story, but I'm pretty sure I understood the meaning through rational thought. Am I missing some key contradiction/ambiguity? [1] http://en.wikipedia.org/wiki/K%C5%8Dan http://en.wikipedia.org/wiki/K%C5%8Dan