American legal theorists have long been preoccupied with questions about method and truth in legal and moral reasoning. Their inquiries have focused on whether and how citizens, lawmakers, judges, and other public officials can attain truth, correctness, or certainty in their legal and moral pronouncements.1 Until the last decades of the nineteenth century, American legal theory was dominated by formalist views, which saw legal reasoning in the ideal case as a closed, deductive system based upon a finite number of foundational principles and rules. By the beginning of the twentieth century, formalism as an ideal was under attack by adherents of legal realism and sociological jurisprudence.2 Members of the latter two schools of thought argue...