I think that when asked, "Why did the chicken cross the road?", that we must first ask if it is a whole, live chicken, or just a piece of chicken. Secondly, and where it is a whole, live chicken, I think that we should ask, seriously, if it is a sentient being, capable even of knowing that there is a road. And thirdly, I think we should face the profound dilemma that we may then find ourselves in; that we are not chickens.
You know, I forgot to ask if the chicken propels itself. I would think if would have to be live, and whole enough to propel itself to consider the question any further.