In the passage, the author is primarily concerned with A. outlining the problems that might be faced by a legislature attempting to create a complete body of law that would prevent judges from making rather than applying the law B. justifying the idea that "hard" cases will always exist in the practice of law, no matter what laws are written or how they are applied C. presenting evidence to support Dworkin's idea that legal rules apply in an all-or-nothing fashion whereas legal principles apply in more sophisticated ways D. critiquing the concept of the open texture of legal terms as a conceptual flaw in Hart's otherwise well-regarded book E. demonstrating that Dworkin's concept of legal principles does not form the basis for a successful attack on Hart's theory of legally indeterminate cases