Previous edition, 1st, published in 1971.

Summary of, and response to criticism of, the authors' book, Fairness versus welfare (Harvard University Press, 2002).

This paper studies the use of hypothetical and value-based reasoning in US Supreme-Court cases concerning the United States Fourth Amendment. Drawing upon formal AI & Law models of legal argument a semi-formal reconstruction is given of parts of the Carney case, which has been studied previously in AI & law research on case-based reasoning. As part of the reconstruction, a semi-formal proposal is made for extending the formal AI & Law models with forms of metalevel reasoning in several argument schemes. (...) The result is compared with Rissland’s (1989) analysis in terms of dimensions and Ashley’s (2008) analysis in terms of his process model of legal argument with hypotheticals. (shrink)

Reasoning with cases has been a primary focus of those working in AI and law who have attempted to model legal reasoning. In this paper we put forward a formal model of reasoning with cases which captures many of the insights from that previous work. We begin by stating our view of reasoning with cases as a process of constructing, evaluating and applying a theory. Central to our model is a view of the relationship between cases, rules based on cases, (...) and the social values which justify those rules. Having given our view of these relationships, we present our formal model of them, and explain how theories can be constructed, compared and evaluated. We then show how previous work can be described in terms of our model, and discuss extensions to the basic model to accommodate particular features of previous work. We conclude by identifying some directions for future work. (shrink)

The article begins with an outline of the balancing construction as developed by the German Federal Constitutional court since the Lüth decision in 1958. It then takes up two objections to this approach raised by Jürgen Habermas. The first maintains that balancing is both irrational and a danger for rights, depriving them of their normative power. The second is that balancing takes one out of the realm of right and wrong, correctness and incorrectness, and justification, and, thus, out of the (...) realm of the law. The article attempts to counter these objections by showing that there exists a rational structure of balancing that can be made explicit by a “Law of Balancing” and a “Disproportionality Rule.” These rules show, first, that balancing is not a danger for rights but, on the contrary, a necessary means of lending them protection, and second, that balancing is not an alternative to argumentation but an indispensable form of rational practical discourse. (shrink)

The article begins with an outline of the balancing construction as developed by the German Federal Constitutional court since the Lüth decision in 1958. It then takes up two objections to this approach raised by Jürgen Habermas. The first maintains that balancing is both irrational and a danger for rights, depriving them of their normative power. The second is that balancing takes one out of the realm of right and wrong, correctness and incorrectness, and justification, and, thus, out of the (...) realm of the law. The article attempts to counter these objections by showing that there exists a rational structure of balancing that can be made explicit by a “Law of Balancing” and a “Disproportionality Rule.” These rules show, first, that balancing is not a danger for rights but, on the contrary, a necessary means of lending them protection, and second, that balancing is not an alternative to argumentation but an indispensable form of rational practical discourse. (shrink)

Repeatedly and successfully, the celebrated Harvard philosopher Robert Nozick has reached out to a broad audience beyond the confines of his discipline, addressing ethical and social problems that matter to every thoughtful person. Here Nozick continues his search for the connections between philosophy and "ordinary" experience. In the lively and accessible style that his readers have come to expect, he offers a bold theory of rationality, the one characteristic deemed to fix humanity's "specialness." What are principles for? asks Nozick. We (...) could act simply on whim, or maximize our self-interest and recommend that others do the same. As Nozick explores rationality of decision and rationality of belief, he shows how principles actually function in our day-to-day thinking and in our efforts to live peacefully and productively with each other. Throughout, the book combines daring speculations with detailed investigations to portray the nature and status of rationality and the essential role that imagination plays in this singular human aptitude. (shrink)

Rules are a central component of such diverse enterprises as law, morality, language, games, religion, etiquette, and family governance, but there is often confusion about what a rule is, and what rules do. Offering a comprehensive philosophical analysis of these questions, this book challenges much of the existing legal, jurisprudential, and philosophical literature, by seeing a significant role for rules, an equally significant role for their stricter operation, and making the case for rules as devices for the allocation of power (...) among decision-makers. (shrink)

The most obvious way of settling disagreements peacefully is to take a vote. Yet, as Jeremy Waldron points out, the attitudes of philosophers and political theorists towards majority voting have ranged from indifference to hostility. Piled on top of all this scorn for legislation comes further scorn from social choice theorists, who insist that majority rule is useless as a means of making decisions.

Practical Reason and Norms focuses on three problems: In what way are rules normative, and how do they differ from ordinary reasons? What makes normative systems systematic? What distinguishes legal systems, and in what consists their normativity? All three questions are answered by taking reasons as the basic normative concept, and showing the distinctive role reasons have in every case, thus paving the way to a unified account of normativity. Rules are a structure of reasons to perform the required act (...) and an exclusionary reason not to follow some competing reasons. Exclusionary reasons are explained, and used to unlock the secrets of orders, promises, and decisions as well as rules. Games are used to exemplify normative systems. Inevitably, the analysis extends to some aspects of normative discourse, which is truth-apt, but with a diminished assertoric force. (shrink)

This paper takes up Berman and Hafner's (1993) challenge to model legal case-based reasoning not just in terms of factual similarities and differences but also in terms of the values that are at stake. The formal framework of Prakken and Sartor (1998) is applied to examples of case-based reasoning involving values, and a method for formalising such examples is proposed. The method makes it possible to express that a case should be decided in a certain way because that advances certain (...) values. The method also supports the comparison of conflicting precedents in terms of values, and it supports debates on the relevance of distinctions in terms of values. (shrink)

Pollock describes an exciting theory of rationality and its partial implementation in OSCAR, a computer system whose descendants will literally be persons.

Throughout, the book combines daring speculations with detailed investigations to portray the nature and status of rationality and the essential role that...

"[This book] proposes new foundations for the Bayesian principle of rational action, and goes on to develop a new logic of desirability and probabtility."—Frederic Schick, _Journal of Philosophy_.

This paper argues the thesis that a particular style of reasoning, qualitative comparative reasoning (QCR), plays a role in at least three areas of legal reasoning that are central in AI and law research, namely legal theory construction, case-based reasoning in the form of case comparison, and legal proof. The paper gives an informal exposition of one particular way to deal with QCR, based on the author’s previous work on reason-based logic (RBL). Then it contains a substantially adapted formalisation of (...) RBL, to make RBL suitable for dealing with QCR. The paper concludes with a brief discussion of related work. (shrink)

This book examines the relationship between the idea of legitimacy of law in a democratic system and equality, conceived in a tripartite sense: political, legal, and social. Exploring the constituent elements of the legal philosophy underlying concepts of legitimacy, this book seeks to demonstrate how a conception of democratic legitimacy is necessary for understanding and reconciling equality and political legitimacy by tracing and examining the conceptions of equality in political, legal, and social dimensions. -/- In the sphere of political equality (...) this book argues that the best construction of equality in a democratic system - which resonates with the legitimizing function of majority rule - is that of equality of political opportunity. It is largely procedural, but those procedures represent important substantive values built into a majoritarian system. In the sphere of legal equality it argues that a plausible conception of non-discrimination can be constructed through a "reflective equilibrium" process, and should reject a thoughtless assumption that the presence of some particular criteria of differentiations necessarily taints a legal classification as discriminatory. Finally, the chapters on social equality explore, in some detail, the currently influential, and presumptively attractive, "luck egalitarianism": the idea that social equality calls for neutralizing the disparate effects of bad brute luck upon a person's position in society. (shrink)

Jeremy Waldron is one of the world's leading legal and political philosophers. This collection brings together thirteen of his most recent essays which, in the course of working the book up for publication, the author has revisited and thoroughly revised. He addresses central issues within the liberal tradition, focusing on the law and its role in a pluralistic state which experiences deep disagreements about values and rights, and about the role of the state itself.

What can reason do for us and what can't it do? This is the question examined by Herbert A. Simon, who received the 1978 Nobel Prize in Economic Sciences "for his pioneering work on decision-making processes in economic organizations." The ability to apply reason to the choice of actions is supposed to be one of the defining characteristics of our species. In the first two chapters, the author explores the nature and limits of human reason, comparing and evaluating the major (...) theoretical frameworks that have been erected to explain reasoning processes. He also discusses the interaction of thinking and emotion in the choice of our actions. In the third and final chapter, the author applies the theory of bounded rationality to social institutions and human behavior, and points out the problems created by limited attention span human inability to deal with more than one difficult problem at a time. He concludes that we must recognize the limitations on our capabilities for rational choice and pursue goals that, in their tentativeness and flexibility, are compatible with those limits. (shrink)

Natural Justice is a bold attempt to lay the foundations for a genuine science of morals using the theory of games. Since human morality is no less a product of evolution than any other human characteristic, the book takes the view that we need to explore its origins in the food-sharing social contracts of our prehuman ancestors. It is argued that the deep structure of our current fairness norms continues to reflect the logic of these primeval social contracts, but the (...) particular fairness norm a society operates is largely a product of cultural evolution. In pursuing this point, the book proposes a naturalistic reinterpretation of John Rawls' original position that reconciles his egalitarian theory of justice with John Harsanyi's utilitarian theory by identifying the environment appropriate to each. (shrink)

Cost-benefit analysis is a widely used governmental evaluation tool, though academics remain skeptical. This volume gathers prominent contributors from law, economics, and philosophy for discussion of cost-benefit analysis, specifically its moral foundations, applications and limitations. This new scholarly debate includes not only economists, but also contributors from philosophy, cognitive psychology, legal studies, and public policy who can further illuminate the justification and moral implications of this method and specify alternative measures. These articles originally appeared in the Journal of Legal Studies. (...) Contributors: - Matthew D. Adler - Gary S. Becker - John Broome - Robert H. Frank - Robert W. Hahn - Lewis A. Kornhauser - Martha C. Nussbaum - Eric A. Posner - Richard A. Posner - Henry S. Richardson - Amartya Sen - Cass R. Sunstein - W. Kip Viscusi. (shrink)

This book analyses the general structure of constitutional rights reasoning under the German Basic Law. It deals with a wide range of problems common to all systems of constitutional rights review. In an extended introduction the translator argues for its applicability to the British Constitution, with particular reference to the Human Rights Act 1998.

"A sequel to Pollock's How to Build a Person, this volume builds upon that theoretical groundwork for the implementation of rationality through artificial ...

Do citizens have an obligation to obey the law? This book differs from standard approaches by shifting from the language of obedience to that of deference. The popular view that law claims authority but does not have it is here reversed on both counts: law does not claim authority but has it. Though the focus is on political obligation, the author approaches that issue indirectly by first developing a more general account of when deference is due to the view of (...) others. Two standard practices that political theorists often consider in exploring the question of political obligation - fair-play and promise-keeping - can themselves be seen as examples of a duty of deference. In this respect the book defends a more general theory of ethics whose scope extends beyond the question of political obligation to questions of duty in the case of law, promises, fair play and friendship. (shrink)