But I couldn't resist posting this. I actually invented a Zen koan as part of a usenet thread on self-replicating programs:
Zen master Kwine was raking pebbles in the garden when a student approached and asked, "Master, what is the shortest self-replicating Lisp program?"
The master said nothing and continued raking. The student was annoyed and asked, "Master, why will you not answer my question?"
The master looked up and said, "But I did answer your question."
At that moment the student was enlightened.