Why did the chicken cross the road?

Plato: For the greater good.
Captain James T Kirk: To boldly go where no chicken has gone before.
Richard Nixon: The chicken did not cross the road. I repeat, the chicken did NOT cross the road.
Jerry Seinfeld: Why does anyone cross a road? I mean, why doesn't anyone ever think to ask, What the heck was this chicken doing walking around all over the place, anyway?
Sigmund Freud: The fact that you are at all concerned that the chicken crossed the road reveals your underlying insecurity.
Bill Gates: I have just released the new Chicken Office 2000, which will not only cross roads, but will lay eggs, file your important documents, balance your checkbook and eat your neighbour.
Charles Darwin: Chickens, over great periods of time, have been naturally selected in such a way that they are now genetically disposed to cross roads.
Albert Einstein: Whether the chicken crossed the road or the road moved beneath the chicken depends upon your frame of reference.
Official Chicken Representative: Because he wanted to. Do you not think that maybe chickens have rights too? If you crossed the road no one would question you.
Colonel Sanders: I missed one?