Errata slip inserted. Bibliography: p. 137-140.

This book presents modern logic as the formalization of reasoning that needs and deserves a semantic foundation. Chapters on propositional logic; parsing propositions; and meaning, truth and reference give the reader a basis for establishing criteria that can be used to judge formalizations of ordinary language arguments. Over 120 worked examples illustrate the scope and limitations of modern logic, as analyzed in chapters on identity, quantifiers, descriptive names, and functions. The chapter on second-order logic shows how different conceptions of predicates (...) and propositions do not lead to a common basis for quantification over predicates, as they do for quantification over things. Notable for its clarity of presentation and supplemented by many exercises, this volume will be invaluable for philosophers, linguists, mathematicians, and computer scientists who wish to better understand the tools they use in formal reasoning. (shrink)

The country's leading libertarian scholar sets forth the essential principles for a legal system that best balances individual liberty versus the common good.

The contributions in the book examine the historical and contemporary manifestations of organized crime, the symbiotic relationship between legitimate and ...

With this book, Richard A. Epstein provides a spirited and systematic defense of classical liberalism against the critiques mounted against it over the past thirty years. One of the most distinguished and provocative legal scholars writing today, Epstein here explains his controversial ideas in what will quickly come to be considered one of his cornerstone works. He begins by laying out his own vision of the key principles of classical liberalism: respect for the autonomy of the individual, (...) a strong system of private property rights, the voluntary exchange of labor and possessions, and prohibitions against force or fraud. Nonetheless, he not only recognizes but insists that state coercion is crucial to safeguarding these principles of private ordering and supplying the social infrastructure on which they depend. Within this framework, Epstein then shows why limited government is much to be preferred over the modern interventionist welfare state. Many of the modern attacks on the classical liberal system seek to undermine the moral, conceptual, cognitive, and psychological foundations on which it rests. Epstein rises to this challenge by carefully rebutting each of these objections in turn. For instance, Epstein demonstrates how our inability to judge the preferences of others means we should respect their liberty of choice regarding their own lives. And he points out the flaws in behavioral economic arguments which, overlooking strong evolutionary pressures, claim that individual preferences are unstable and that people are unable to adopt rational means to achieve their own ends. Freedom, Epstein ultimately shows, depends upon a skepticism that rightly shuns making judgments about what is best for individuals, but that also avoids the relativistic trap that all judgments about our political institutions have equal worth. A brilliant defense of classical liberalism, Skepticism and Freedom will rightly be seen as an intellectual landmark. (shrink)

Using the case of an industrial accident involving a killer robot, the author successfully combines technical and ethical concepts to present to students and professionals real-life issues that they may one day have to confront.

This book is dedicated to a classic presentation of the theory of computable functions in the context of the foundations of mathematics. Part I motivates the study of computability with discussions and readings about the crisis in the foundations of mathematics in the early 20th century, while presenting the basic ideas of whole number, function, proof, and real number. Part II starts with readings from Turing and Post leading to the formal theory of recursive functions. Part III presents sufficient formal (...) logic to give a full development of Gödel's incompleteness theorems. Part IV considers the significance of the technical work with a discussion of Church's Thesis and readings on the foundations of mathematics. This new edition contains the timeline "Computability and Undecidability" as well as the essay "On mathematics". (shrink)

This book grew out of my confusion. If logic is objective how can there be so many logics? Is there one right logic, or many right ones? Is there some underlying unity that connects them? What is the significance of the mathematical theorems about logic which I've learned if they have no connection to our everyday reasoning? The answers I propose revolve around the perception that what one pays attention to in reasoning determines which logic is appropriate. The act of (...) abstracting from our reasoning in our usual language is the stepping stone from reasoned argument to logic. We cannot take this step alone, for we reason together: logic is reasoning which has some objective value. For you to understand my answers, or perhaps better, conjectures, I have retraced my steps: from the concrete to the abstract, from examples, to general theory, to further confirming examples, to reflections on the significance of the work. (shrink)

'Tis true governments cannot be supported without great charge, and it is fit everyone who enjoys a share of the protection should pay out of his estate his proportion for the maintenance of it. But still it must be with his own consent, i.e., the consent of the majority giving it either by themselves or their representatives chosen by them. For if any one shall claim a power to lay and levy taxes on the people, by his own authority, and (...) without such consent of the people, he thereby invades the fundamental law of property and subverts the end of government. For what property have I in that which another may by right take when he pleases to himself. (shrink)

MOTIVATION The constructivization of ; => D(_£^') poses several problems. For some of these the tools of MD can be modified; for others new methods will need to be established. What must we do to make a full approximation to ; * D? We ...

Without question, the libertarian vision that envisions the use of state power to control force and fraud as a proper governmental function is one piece of any comprehensive political theory. But the hard-line libertarian goes astray in finding this the sole function of government or in thinking that the maintenance of order is possible without the imposition of taxes. Rather, the case for taxation rests on the familiar view that state coercion is sometimes necessary to overcome coordination problems. The justification (...) for a minimal system of taxation therefore is that it provides more in benefits for the individuals taxed than they lose in revenue. Stressing the benefit shows the mistake in Nozick’s famous observation that taxation is “on a par” with forced labor. And the proper understanding of the logic of taxation shows the defects in the series of steps in demoktesis—or “ownership of the people, by the people, and for the people”—that Nozick offers to show how difficult it is to draw any clear line between taxation and slavery. (shrink)

I.WhatVintage ofCivilRights?In this paper I wish to compare and contrast two separate conceptions of civil rights and to argue that the older, more libertarian conception of the subject is preferable to the more widely accepted version used in the modern civil rights movement. The first conception of civil rights focuses on the question of individual capacity. The antithesis of a person with civil rights is the slave. But even if individuals are declared free, they are nonetheless denied their civil rights (...) if they are unable to own property, to enter into contracts, to make wills, to give evidence, and to sue (and be sued) in courts. With all these civil rights claims, the target of the individual grievance is the state; it has denied large classes of individuals the formal capacities that it recognized and protected in others. The Civil War was fought largely over slavery. In its aftermath, civil rights claims protecting individual capacity received explicit, if imperfect, statutory and constitutional protection. The postbellum protections didnotguarantee these rights in absolute fashion – that is, in a way that would not be susceptible to abridgment under any circumstances. Instead, civil rights were protected in what might be called a relative fashion: whatever rights of this sort were enjoyed by white citizens were to be enjoyed by the newly freed black citizens as well. (shrink)

Imitation is said to be the sincerest form of flattery. Socially, the proposition may well be true. But in the world of ideas it is false: to the extent that two incompatible traditions use the same words or symbols to articulate different visions of legal or social organization, imitation begets confusion, not enlightenment. The effects of that confusion, moreover, are not confined to the world of ideas, but spill over into the world of politics and public affairs. Words are more (...) than tools of description: they work also as tools of persuasion and transformation. Let a term have a favorable connotation in one context, and its imitative use can mislead people into thinking that a major departure from established practice is merely the extension or updating of an old principle to deal with new circumstances. (shrink)

John Donne's song was hardly written in the tradition of political philosophy, but it has a good deal to say about the theme of luck, both good and bad, which I want to address. There is no doubt but that bad luck has bad consequences for the persons who suffer from it. If there were a costless way in which the consequences of bad luck could be spread across everyone in society at large, without increasing the risk of its occurrence, (...) then most of us would pronounce ourselves better off for the change. In this sense it can be said, for example, that there is a utilitarian grounding for a moral obligation to care and provide for those persons who suffer the fortunes of bad luck. For the sake of argument I do not wish to contest this particular starting point, although there are many who would. Instead, I want to ask the question of whether this moral obligation should be converted into a legal obligation, backed by public force. The dominant answer to that question today is yes. Even those who think that markets should determine decisions on production find that the state has a proper role to reduce the adverse consequences of bad luck. My cast of mind is more skeptical. In life, or, in this instance, politics, “come bad chance, and we do join to it our strength.” In general the effort to use coercion to counter the adverse effects of luck tends only to make matters worse. (shrink)

A broad range of intellectual perspectives may be brought to bear on any important social institution. To this general rule, the institution of private property is no exception. The desirability of private property has been endlessly debated across the disciplines: philosophical, historical, economic, and legal. Yet there is very little consensus over its proper social role and limitations. Is it possible to find a unique solution to questions of property and private ownership, good for all resources and for all times? (...) The famous defense of private property that is found in chapter 5 of John Locke'sSecond Treatise of Governmentanswers this question in the affirmative, for Locke writes as though all property was given to mankind in common, and then seeks to find the quickest and most expeditious way to convert all common property into private property. His implicit, but undefended, assumption is that common forms of property are both undesirable and unstable, while private forms of ownership are always just the opposite. Yet his preferred method for moving from a commons to a regime of private property—the unilateral decision to appropriate by each actor—is one that has been frequently condemned as a sop to unbridled egotism, even though it is subject to two constraints: the first against waste, and the second requiring the appropria-tor to leave “enough, and as good” for others. (shrink)

The most popular method of incorporating time into a formal logic is based on the work of Arthur Prior. It treats tenses as operators on sentences. In this essay I show a serious problem with that approach, a confusion of scheme versus proposition, which makes any system built in that way incoherent. I will compare how other formal logics deal with the scheme versus proposition distinction and find that only for formal modal logics does the same problem arise. I then (...) compare Prior’s approach to other ways of taking time into account in formal logics. (shrink)

In this paper, I want to explore the relationship between the various forms of individual self-interest and the appropriate structures of government. I shall begin with the former, and by degrees extend the analysis to the latter. I do so in order to mount a defense of principles of limited government, private property, and individual liberty. The ordinary analysis of self-interest treats it as though it were not only a given but also a constant of human nature, and thus makes (...) few allowances for differences between persons. Yet common experience tells us that personality and behavior are as unique as fingerprints. The positive inquiry, therefore, is how we find what is constant about self-interest in a world of natural human diversity. The normative inquiry must take into account both the constant and variable features of human nature in order to determine what forms of social arrangements hold the greatest prospect of long-term social advantage. The gulf between ‘is’ and ‘ought’ must be overcome here, as it must be in all normative discourse. Yet we cannot make sensible judgments of what ought to be the case in the domain of rules unless we first have some idea of what is the case in the domain of behavior. The initial inquiry asks why self-interest is regarded as a constant of human behavior. The explanation derives more from the biological and less from the social. The powerful pressures of natural selection weed out any organisms for whom selfinterest is not the paramount consideration. (shrink)

Taxation is more than one thing. Taxes can be levied in various ways on various things, with varying effects on a culture and an economy, and raising different challenges of justification.

In Anarchy, State, and Utopia, Robert Nozick seeks to demonstrate that principles of justice in acquisition and transfer can be applied to justify the minimal state, and no state greater than the minimal state. That approach fails to acknowledge the critical role that forced exchanges play in overcoming a range of public goods and coordination problems. These ends are accomplished by taking property for which the owner is compensated in cash or in kind in an amount that leaves him better (...) off (by his own lights) than before the transaction. Forced exchanges use coercion to form the state, but the just compensation requirement guards against redistribution state imposed redistribution for collateral purposes. Once these forced exchanges are allowed to form a state, then they may be used thereafter to justify the powers of taxation and eminent domain used to support infrastructure (roads, sewers, public utilities) that neither the minimal state nor private markets can supply. Footnotesa I have benefited from comments at the workshop at the Social Sciences Division of the California Institute of Technology. My thanks to Justin Herring and Eric Murphy, The University of Chicago Law School, for their usual capable research assistance. (shrink)

The inequalities of wealth and fortune form a central part of the human condition, and these over time have been a constant source of social unease. Whether they should be praised and preserved or endured or corrected is an issue that produces uniform discord. One source of this difficulty in analysis stems from the possible ways in which these persistent inequalities arise. It is easy to condemn any differences in wealth created by the victor's expropriation of the vanquished's honest toil. (...) It is far more difficult to condemn those identical differences when they are attributable to the thrift and foresight of the successful relative to the laziness or self-destructiveness of the impoverished. Furthermore, most find it morally ambiguous how best to respond to differences between persons that are the result of luck or chance, such that they do not reflect positively or negatively on either the character of those who have done well or those who have done poorly. (shrink)

John Donne's song was hardly written in the tradition of political philosophy, but it has a good deal to say about the theme of luck, both good and bad, which I want to address. There is no doubt but that bad luck has bad consequences for the persons who suffer from it. If there were a costless way in which the consequences of bad luck could be spread across everyone in society at large, without increasing the risk of its occurrence, (...) then most of us would pronounce ourselves better off for the change. In this sense it can be said, for example, that there is a utilitarian grounding for a moral obligation to care and provide for those persons who suffer the fortunes of bad luck. For the sake of argument I do not wish to contest this particular starting point, although there are many who would. Instead, I want to ask the question of whether this moral obligation should be converted into a legal obligation, backed by public force. The dominant answer to that question today is yes. Even those who think that markets should determine decisions on production find that the state has a proper role to reduce the adverse consequences of bad luck. My cast of mind is more skeptical. In life, or, in this instance, politics, “come bad chance, and we do join to it our strength.” In general the effort to use coercion to counter the adverse effects of luck tends only to make matters worse. (shrink)

The variety and complexity of the eight papers in this Symposium issue are evidence that immigration is a tough nut to crack both as a matter of policy and application. There is no way that any short summary can do justice to these papers, which take a variety of moral, economic, historical, and empirical approaches to some of the recurrent issues in the field, so it is best in this short issue to try to situate the problem in a general (...) classical liberal context, to show where the pressure points are most likely to appear.The initial way to approach this problem is to start with the simple proposition that the world today is divided into national territories where the practical norm is well-nigh universal: That each sovereign state has exclusive control over its own territory, which, among other things, allows it to decide which individuals are members of that state. These citizens have privileges that may be exercised, no questions asked, on such key matters as entering labor markets, owning property, voting, and otherwise participating in political affairs. All these activities may be denied or granted, at will, to any and all outsiders by the territorial sovereign.No one doubts the need for having some form of territorial control. The need to have some monopoly of force could not be achieved if the entire world, with its infinite diversity of locations and populations, were under a single sovereign. Indeed, in many cases, the divisions within a given country may be so pronounced that separation rather than aggregation is the norm. Thus, at the end of the British Raj, India split into India and Pakistan, and later Pakistan split into Pakistan and Bangladesh. Less dramatically, Czechoslovakia split into two countries, the Czech Republic and Slovakia, while the former Yugoslavia split into five nations, starting from the northwest: Slovenia, Croatia, Bosnia and Herzegovina, Serbia, and Macedonia. Clearly, these ethic differences, be they large or small, are a major obstacle to the expansion of the size of the state. And today, the territorial instinct reasserts itself as the member states of the European Union impose more restrictions on immigration.Yet at the same time, the normative foundations of this system seem elusive. There is the following deep skepticism about the importance of these borders, expressed in these essays by Jeremy Waldron and Ilya Somin, that these national boundary lines should have such a pronounced role in political economy. Michael Blake pursues this theme further by asking the extent to which classical liberals can justify exclusion through the use of violence—or is it force? The inquiry into the dominant role of territoriality can then be expanded, as by Peter Margulies, to examine all sorts of negative externalities that could be created both by easy and strict rules of admission.Taken as a whole, there is no doubt that these national barriers are a serious obstacle to the free trade in goods and services between two individuals, one inside the boundary and one outside. The general view is that these barriers block the gains from trade, which is what drives economic progress, so that ideally all tariffs and quantitative restrictions should give way to a system of free trade in which petty objections by domestic competitors of foreign firms should not dictate local policies.It should, of course, be evident that powerful conflicting forces on free trade and protectionism ebb and flow over time. It should therefore come as no surprise that the stakes are even higher where what is at stake is the movement of people across national boundaries. The loss to any given country from keeping out potential citizens can be enormous, and we see powerful political forces clamp down on open immigration, so many of these gains from trade are lost. The situation can be even more heartbreaking when the ability to leave a country exposes innocent people to imprisonment or death.So what is the explanation for so many nations closing their borders? Much of the explanation comes from old-fashioned protectionism. Your computer programmers will take the jobs of our specialists. There is all sorts of occupational licensing and other barriers to entry within a domestic economy, so there is no reason to expect that these forces will not exert even greater influence against outsiders who do not, after all, have a voice in the local economy and who, therefore, as Alex Nowrasteh, Michael Howard, and Andrew Forrester observe, have little ability to influence domestic policy even after they enter a country. In addition, as Gabriel Chin discusses, strong racial prejudices also lead to exclusions from the domestic economy. Not only are there objections in, say, the United States and much of Western Europe, of exclusion on straight racial grounds, as exemplified by Chinese exclusion acts. The force of these exclusions are also subject to political change. Thus, the Immigration Act of 1924 (the Johnson-Reed Act) was part of a white supremacist program, which gave way two decades later to a very different legal regime with the Immigration Act of 1965, which put an end to the venerable system of national-origin quotas.Yet two other reasons for exclusion are constantly at issue. Immigrants not only bring in their labor but also their families, cultures, and traditions that, in public spaces, may clash with local norms and cultures on such elementary and critical matters as to whether women should dress modestly and wear head coverings. Will freewheeling Danes and Swedes feel comfortable if large numbers of Muslims continue their traditional practices with strong barriers between men and women? There are no obvious market mechanisms that will mitigate these issues, and the situation becomes even more fraught if there are large welfare or educational costs that fall, at least in the short run, on local citizens. These are compounded by the fact that immigrants will typically gain political rights that could easily skew the balance of political power between established and newly arrived ethnic groups by altering the outcome of national and local elections. And letting people in is not just done on a simple open-borders policy. Thus, in many countries, as Lance Pritchett discusses, there is the controversial option of letting foreigners in on short-term labor visas that require them to leave after a certain period. And there are further questions about whether people should be deported if they lied on their entry applications or committed some crime while in the new country, as has occurred in the United States. The numbers of cases can be high and their complexity great, so it is fair to ask, along with Jill Family, whether some self-conscious exceptions to the Administrative Procedure Act of 1946, analogous statutes elsewhere, should be regarded as part of the new normal.It is therefore necessary to deal with the thrust and counterthrust on all these issues. It is also fair to ask whether classical liberalism has a distinctive view on these issues, or whether the combination of private gains and multidirectional externalities gives rise to empirical questions that, as always, require further reflection, even when certain situations—the major influx of illegal immigrants on the US southern border—will generate such powerful emotions that detached intellectual inquiry is ever more difficult. We cannot answer these questions, and thus offer to you a set of essays that take a stab at these difficult topics. (shrink)

Managed Care Organizations (MCOs) are frequently criticized for their marketing mistakes. Often that criticism is leveled against an implicit benchmark of an ideal competitive market or an ideal system of government provision. But any accurate assessment in the choice of health care organizations always requires a comparative measure of error rates. These are high in the provision of health care, given the inherent uncertainties in both the cost and effectiveness of treatment. But the continuous and rapid evolution of private health (...) care mechanisms is, in the absence of regulation, more likely to secure access and contain costs than any system of government regulation. State regulation is subject to the risk of capture and to the sluggish and acquisitive behavior of state run monopolies. The proposed fixes for the MCOs (rights to specialists, access to physicians outside the network, guaranteed emergency room access) are likely, when imposed from without, to cost more than they are worth. The long-term risk is that markets will fail under regulation, paving the way for greater losses from massive government control of the health care delivery system. (shrink)

In Simple Rules for a Complex World, I outlined a set of legal rules that facilitate just and efficient social interactions among individuals. Frederick Schauer's critique of my book ignores the specific implications of my system in favor of a general critique of simplicity that overlooks the dangers to liberty when complex rules confer vast discretion on public figures. He also does not refer to the nonlibertarian features of my system that allow for overcoming holdout positions. These “take and pay” (...) rules explain how a system broadly protective of private property responds to well‐known two‐person (Able‐Infirm) hypothetical of the sort advanced by G. A. Cohen, which are designed to show how claims of self‐ownership lend strong support to egalitarian outcomes. (shrink)

This article defends the classical liberal view of human interactions that gives strong protection to associational freedom except in cases that involve the use of force or fraud or the exercise of monopoly power. That conception is at war with the modern antidiscrimination or human rights laws that operate in competitive markets in such vital areas as employment and housing, with respect to matters of race, sex, age, and increasingly, disability. The article further argues that using the “human rights” label (...) to boost the moral case for antidiscrimination laws gets matters exactly backwards, given that any program of forced association on one side of a status relationship (employer, not employee; landlord, not tenant) is inconsistent with any universal norm governing all individuals regardless of role in all associative arrangements. The articled also discusses the tensions that arise under current Supreme Court law, which protects associational freedom arising out of expressive activities (as in cases involving the NAACP or the Boy Scouts), but refuses to extend that protection to other forms of association, such as those involving persons with disabilities. The great vice of all these arrangements is that they cannot guarantee the stability of mandated win/lose relationships. The article further argues that a strong social consensus against discrimination is insufficient reason to coerce dissenters, given that holders of the dominant position can run their operations as they see fit even if others do otherwise. It closes with a short model human rights statute drafted in the classical liberal tradition that avoids the awkward line drawing and balancing that give rise to modern bureaucracies to enforce modern antidiscrimination laws. (shrink)

Over its entire life, the Internal Revenue Code (like other tax systems) has never tried to tax economic income as such, because of the administrative and liquidity problems that arise from taxing any combination of values consumed and from appreciation (or depreciation) of capital stocks. Instead, the common practice limits tax occasions to a realization of income from sale or other disposition of property. Even then, if the proceeds of the transaction are not cash or marketable securities, as with many (...) corporation reorganizations, taxation is deferred until these assets are converted in cash or marketable securities.Any effort to eliminate these twin filters by taxing income—and income regardless of realization—will overburden government agencies and private taxpayers, while reducing economic activity. A wealth tax scores even worse by these welfare measures, creating massive problems of evasion and enforcement that will reduce capital formation across the board in the effort to transfer wealth from the ultra-rich to everyone else. A simple tax structure with affordable rates is the only path to economic prosperity. (shrink)

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