In this article the central philosophical issues concerning human-level artificial intelligence (AI) are presented. AI largely changed direction in the 1980s and 1990s, concentrating on building domain-specific systems and on sub-goals such as self-organization, self-repair, and reliability. Computer scientists aimed to construct intelligence amplifiers for human beings, rather than imitation humans. Turing based his test on a computer-imitates-human game, describing three versions of this game in 1948, 1950, and 1952. The famous version appears in a 1950 article in Mind, ‘Computing (...) Machinery and Intelligence’ (Turing 1950). The interpretation of Turing's test is that it provides an operational definition of intelligence (or thinking) in machines, in terms of behavior. ‘Intelligent Machinery’ sets out the thesis that whether an entity is intelligent is determined in part by our responses to the entity's behavior. Wittgenstein frequently employed the idea of a human being acting like a reliable machine. A ‘living reading-machine’ is a human being or other creature that is given written signs, for example Chinese characters, arithmetical symbols, logical symbols, or musical notation, and who produces text spoken aloud, solutions to arithmetical problems, and proofs of logical theorems. Wittgenstein mentions that an entity that manipulates symbols genuinely reads only if he or she has a particular history, involving learning and training, and participates in a social environment that includes normative constraints and further uses of the symbols. (shrink)

We set the Turing Test in the historical context of the development of machine intelligence, describe the different forms of the test and its rationale, and counter common misinterpretations and objections. Recently published material by Turing casts fresh light on his thinking.

American society has a history of turning to physicians during times of extreme need, from plagues in the past to recent outbreaks of communicable diseases. This public instinct comes from a deep seated trust in physician duty that has been earned over the centuries through dedicated and selfless care, often in the face of personal risks. As dangers facing our communities include terroristic events physicians must be adequately prepared to respond, both medically and ethically. While the ethical principles that govern (...) physician behavior—beneficence, nonmaleficence, autonomy, and social justice—are unchanging, fundamental doctrines must change with the new risks inherent to terroristic events. Responding to mass casualty disasters caused by terrorists, natural calamities, and combat continue to be challenging frontiers in medicine. Preparing physicians to deal with the consequences of a terroristic disease must include understanding the ethical challenges that can occur. (shrink)

It has long been said that legislation ought to be knowable: accessible, comprehensible, and so forth. This is often described as an essential element of the rule of law. But in many legal systems, legislation has become so voluminous and complex that few people know its content. Rather than admit that the rule of law has been compromised, some scholars take legislative complexity as a provocation to rethink what the rule of law requires—and conclude that, for various reasons, the rule (...) of law can prevail even if legislation is not reasonably knowable to the people. This article responds to this line of scholarship and defends the orthodox position that the public ought to be able to understand legislation, or at least reasonably so. That is necessary to enable people to plan their lives in a way that properly reflects the role of legislation in contemporary administrative states. (shrink)

It is with great pleasure and a sense of urgency that we present this KIEJ double issue on ethical issues raised by the COVID-19 pandemic. The sheer range of ethical concerns raised by the pandemic, combined with the speed with which these problems emerged, is staggering and unprecedented in our generation. We have tried to give space to papers that raise immediately pressing ethical issues that have not received much discussion in popular media. Topics range from fundamental questions about how (...) we set up our public health infrastructure, to ethical issues in scientific communication and the translation of science into policy, to the impact of the pandemic on people with intellectual disabilities, to the ethics of... (shrink)

In this book Jeffrey Burton Russell explores the many and complex reasons for the gradual erosion of the idea of heaven in the modern era. Although the seeds of skepticism were planted in the Enlightenment, he shows, the real decline dates to the nineteenth century. This is a fascinating tale that sheds light not only on the history of Christian thought, but on the process of secularization in the West; Russell shows us the grubby soul of our materialistic and (...) uncritically scientific society. Finally he argues that we can and should make room for paradise for the spiritual health of our culture and points the way towards metaphors of perfection and transcendence that resonate in our time. (shrink)

Alterations to cognitive function are often reported with depression and anxiety symptoms, yet few studies have examined the same associations with mental well-being. This study examined the association between mental well-being, depression and anxiety symptoms and cognitive function in 1502 healthy adult monozygotic and dizygotic twins, and the shared/unique contribution of genetic and environmental variance. Using linear mixed models, mental well-being was positively associated with sustained attention, inhibition, cognitive flexibility, motor coordination and working memory, whereas depression and anxiety symptoms were (...) associated with poorer sustained attention, inhibition, cognitive flexibility and executive function. Bivariate twin modelling showed well-being shared a small environmental correlation with motor coordination and a small genetic correlation with working memory. Trivariate twin modelling showed well-being shared a small genetic correlation with inhibition, whereas depression and anxiety symptoms shared a small environmental correlation with inhibition. The remaining variance was mostly driven by unique G and/or E variance. Overall, well-being and depression and anxiety symptoms show both independent and shared relationships with cognitive functions but this is largely attributable to unique G or E variance and small shared G/E variance between pairs of variables. (shrink)

Shortly before his death, Richard Bader commented in this Journal on the dichotomy that exists within chemistry and between chemists. We believe that the dichotomy results from different goals and objectives inherent in the chemical disciplines. At one extreme are designers who synthesize new molecules with interesting properties. For these chemists, the rationale underpinning molecular synthesis is far less important than the end product—the molecules themselves. At the other extreme are the chemists who seek a fundamental understanding of molecular properties. (...) We suggest that the Quantum Theory of Atoms in Molecules, by virtue of the rich hierarchical structure inherent in the theory, offers a bridge through which to unite these two groups. However, if there is to be reconciliation, it falls to the theorists to develop “quantum mechanically” correct tools and concepts useful to the synthetic and applied chemist. (shrink)

Logic and Reality is a collection of essays by philosophers, logicians, mathematicians, and computer scientists, celebrating the work of the late distinguished philosopher Arthur Prior on the eightieth anniversary of his birth. Topics range from philosophical discussions of the nature of time and of the nature of logic itself, to descriptions of computer systems that can reason and take account of the fact that they exist in a temporal world.

This article provides a detailed analysis of the transfer of a key cluster of ideas from mathematical logic to computing. We demonstrate the impact of certain of Turing’s logico-philosophical concepts from the mid-1930s on the emergence of the modern electronic computer—and so, in consequence, Turing’s impact on the direction of modern philosophy, via the computational turn. We explain why both Turing and von Neumann saw the problem of developing the electronic computer as a problem in logic, and we describe their (...) joint journey from logic to electronic computation. While much has been written about Turing’s and von Neumann’s individual contributions to the development of the computer, this article investigates less well-known terrain: their interactions and mutual influences. Along the way we argue against ‘logic skeptics’ and ‘Turing skeptics’, who claim that neither logic nor Turing played any significant role in the creation of the modern computer. (shrink)

Exponents and critics of semantic presupposition have almost invariably based their discussion on the ('Standard') definition of presupposition implied by Frege and Strawson. In this study Noel Burton-Roberts argues convincingly against this definition, that leads it to a three-valued semantics. He presents a very simple semantic definition which is weaker, more general and leads to a semantics more easily interpreted as two-valued with gaps. The author shows that a wide range of intuitive facts that eluded the Standard definition follow (...) directly from this ('Revised') definition itself: facts about the presuppositions of compound sentences and modal sentences, about presuppositional conflict and about differences in the logical status of simple sentences suffering from presupposition failure. The book includes a detailed argument that an ambiguity of natural language negation, generally assumed to be necessary to the defence of semantic presupposition, is neither possible nor necessary in a presuppositional semantics. Noel Burton-Roberts has made an authoritative contribution to a debate which has involved philosophers and linguists for many years. His command of the issues, his clarity of exposition and his theoretical insight may well serve to change the boundaries of that debate. (shrink)

Buddhism, in its diverse forms and throughout its long history, has had a profound influence on Asian cultures and the lives of countless individuals. In recent times, it has also attracted great interest among people in other parts of the world, including philosophers. Buddhist traditions often deal with ideas and concerns that are central to philosophy. A distinctively Buddhist philosophy of religion can be developed which focuses on Buddhist responses to issues such as the problem of suffering, the purpose and (...) potential of human existence, life after death, freedom and moral responsibility, appearance and reality, the nature of religious language, attitudes to religious diversity and the relationship between Buddhism and science. Buddhism: A Contemporary Philosophical Investigation examines some of the central questions that such ideas raise, drawing on ancient and more recent sources from a variety of Buddhist traditions, as viewed from a contemporary philosophical standpoint. (shrink)

Lectures, scientific papers, top secret wartime material, correspondence, and broadcasts are introduced and set in context by Jack Copeland, Director of the Turing Archive for the History of Computing."--Jacket.

Presupposing no familiarity with the technical concepts of either philosophy or computing, this clear introduction reviews the progress made in AI since the inception of the field in 1956. Copeland goes on to analyze what those working in AI must achieve before they can claim to have built a thinking machine and appraises their prospects of succeeding. There are clear introductions to connectionism and to the language of thought hypothesis which weave together material from philosophy, artificial intelligence and neuroscience. (...) John Searle's attacks on AI and cognitive science are countered and close attention is given to foundational issues, including the nature of computation, Turing Machines, the Church-Turing Thesis and the difference between classical symbol processing and parallel distributed processing. The book also explores the possibility of machines having free will and consciousness and concludes with a discussion of in what sense the human brain may be a computer. (shrink)

To compute is to execute an algorithm. More precisely, to say that a device or organ computes is to say that there exists a modelling relationship of a certain kind between it and a formal specification of an algorithm and supporting architecture. The key issue is to delimit the phrase of a certain kind. I call this the problem of distinguishing between standard and nonstandard models of computation. The successful drawing of this distinction guards Turing's 1936 analysis of computation against (...) a difficulty that has persistently been raised against it, and undercuts various objections that have been made to the computational theory of mind. (shrink)

Charles Travis presents a series of essays in which he has developed his distinctive view of the relation of thought to language. The key idea is "occasion-sensitivity": what it is for words to express a given concept is for them to be apt for contributing to any of many different conditions of correctness (notably truth conditions). Since words mean what they do by expressing a given concept, it follows that meaning does not determine truth conditions. This view ties thoughts (...) less tightly to the linguistic forms which express them than traditional views of the matter, and in two directions: a given linguistic form, meaning fixed, may express an indefinite variety of thoughts; one thought can be expressed in an indefinite number of syntactically and semantically distinct ways. Travis highlights the importance of this view for linguistic theory, and shows how it gives new form to a variety of traditional philosophical problems. (shrink)

Mozi (fifth century B.C.) was an important political and social thinker and formidable rival of the Confucianists. He advocated universal love -- his most important doctrine according to which all humankind should be loved and treated as one's kinfolk -- honoring and making use of worthy men in government, and identifying with one's superior as a means of establishing uniform moral standards. He also believed in the will of Heaven and in ghosts. He firmly opposed offensive warfare, extravagance -- including (...) indulgence in music and allied pleasures -- elaborate funerals and mourning, fatalistic beliefs, and Confucianism. (shrink)

Emptiness means that all entities are empty of, or lack, inherent existence - entities have a merely conceptual, constructed existence. Though Nagarjuna advocates the Middle Way, his philosophy of emptiness nevertheless entails nihilism, and his critiques of the Nyaya theory of knowledge are shown to be unconvincing.

What is the role of chance in scientific discovery? And, more to the point, if chance plays a key role in scientific discovery, what room is left for reason? These are grounding questions in the debates, for instance, over whether there is a distinction to be made between discovery and justification in science, and whether innate genius must play a role in discovery or if there exists some method that can be taught to anyone. While the role of chance has (...) been discussed throughout the history of science, it has resurfaced in recent debates over how science should be funded, and particularly in the field of biomedical research. The word serendipity, for example, has become increasingly... (shrink)

A survey of the field of hypercomputation, including discussion of a variety of objections.

This article traces the development of possible worlds semantics through the work of: Wittgenstein, 1913-1921; Feys, 1924; McKinsey, 1945; Carnap, 1945-1947; McKinsey, Tarski and Jónsson, 1947-1952; von Wright, 1951; Becker, 1952; Prior, 1953-1954; Montague, 1955; Meredith and Prior, 1956; Geach, 1960; Smiley, 1955-1957; Kanger, 1957; Hintikka, 1957; Guillaume, 1958; Binkley, 1958; Bayart, 1958-1959; Drake, 1959-1961; Kripke, 1958-1965.

What words mean plays a role in determining when they would be true; but not an exhaustive one. For that role leaves room for variation in truth conditions, with meanings fixed, from one speaking of words to another. What role meaning plays depends on what truth is; on what words, by virtue of meaning what they do are requied to have done (as spoken) in order to have said what is true. There is a deflationist position on what truth is: (...) the notion is exhausted by a given, specified, mass of 'platitudes', each to the effect that if words said (say) things to be thus, things must be that way. (The thought that thus-and-so is true iff thus-and-so.) These platitudes, and so deflationism, miss that aspect of truth that determines meaning's role. Truth requires words to have the uses which, given what they mean, they should have in the circumstances of their speaking. Through this link with use, when words would be true is a factor fixing what it is they said. (shrink)

Presupposing no familiarity with the technical concepts of either philosophy or computing, this clear introduction reviews the progress made in AI since the inception of the field in 1956. Copeland goes on to analyze what those working in AI must achieve before they can claim to have built a thinking machine and appraises their prospects of succeeding.There are clear introductions to connectionism and to the language of thought hypothesis which weave together material from philosophy, artificial intelligence and neuroscience. John (...) Searle's attacks on AI and cognitive science are countered and close attention is given to foundational issues, including the nature of computation, Turing Machines, the Church-Turing Thesis and the difference between classical symbol processing and parallel distributed processing. The book also explores the possibility of machines having free will and consciousness and concludes with a discussion of in what sense the human brain may be a computer. (shrink)

There are various equivalent formulations of the Church-Turing thesis. A common one is that every effective computation can be carried out by a Turing machine. The Church-Turing thesis is often misunderstood, particularly in recent writing in the philosophy of mind.

Only by inhabiting Dao (the Way of Nature) and dwelling in its unity can humankind achieve true happiness and freedom, in both life and death. This is Daoist philosophy's central tenet, espoused by the person--or group of people--known as Zhuangzi (369?-286? BCE) in a text by the same name. To be free, individuals must discard rigid distinctions between right and wrong, and follow a course of action not motivated by gain or striving. When one ceases to judge events as good (...) or bad, man-made suffering disappears, and natural suffering is embraced as part of life. Zhuangzi elucidates this mystical philosophy through humor, parable, and anecdote, using non sequitur and even nonsense to illuminate truths beyond the boundaries of ordinary logic. Boldly imaginative and inventively written, the _Zhuangzi_ floats free of its historical period and society, addressing the spiritual nourishment of all people across time. One of the most justly celebrated texts of the Chinese tradition, the _Zhuangzi_ is read by thousands of English-language scholars each year, yet, until now, only in the Wade-Giles romanization. Burton Watson's conversion to pinyin in this book brings the text in line with how Chinese scholars, and an increasing number of other scholars, read it. (shrink)

There is a view abroad on which perceptual experience has representational content in this sense: in it something is represented to the perceiver as so. On the view, a perceptual experience has a face value at which it may be taken, or which may be rejected. This paper argues that that view is mistaken: there is nothing in perceptual experience which makes it so that in it anything is represented as so. In that sense, the senses are silent, or, in (...) Austin's term, dumb. Perceptual experience is not as such either veridical or delusive. It may mislead, but it does not take representation to accomplish that. (shrink)

The Prologue offers an overview of the Reformation of method from Augustine of Hippo through to the Ramist movement, providing an orientation to the rest of the book. It highlights and explains an important nexus of Realism, exemplarism and illumination fundamental to Ramism. Beginning with Augustine it shows how these themes coalesced into a distinctive Christian philosophy taken up and refined by Franciscans such as Bonaventure of Bagnoregio and John Duns Scotus, as well as by Ramon Lull, the Franciscan-inspired encyclopaedist. (...) It traces the continuation of this methodological impulse into the Platonism and Christian humanism of the Renaissance, highlighting especially the topical and Realist (Scotistic) reform of logic pioneered by Lorenzo Valla and Rudolph Agricola. It concludes by showing the reception of this topical and biblical reform in Philipp Melanchthon and the movement of Reformed scholasticism, revealing Reformed Scotism and Christian philosophy as important preconditions for Ramism. (shrink)

This book provides a novel interpretation of the ideas about language in Ludwig Wittgenstein's Philosophical Investigations. Travis places the "private language argument" in the context of wider themes in the Investigations, and thereby develops a picture of what it is for words to bear the meaning they do. He elaborates two versions of a private language argument, and shows the consequences of these for current trends in the philosophical theory of meaning.

Recent work on Mary Shepherd has largely focused on her metaphysics, especially as a response to Berkeley and Hume. However, relatively little attention has thus far been paid to the epistemological aspects of Shepherd’s program. What little attention Shepherd’s epistemology has received has tended to cast her as providing an unsatisfactory response to the skeptical challenge issued by Hume. For example, Walter Ott and Jeremy Fantl have each suggested that Shepherd cannot avoid Hume’s inductive skepticism even if she is granted (...) her metaphysics. In this paper, I examine Shepherd’s epistemology and argue that her response to Hume is more successful than the current literature suggests. In particular, I argue that, if Shepherd is granted her metaphysics, she can answer Hume’s demand for a rational justification of ordinary inductive inferences via a deductively justified uniformity principle and an appeal to parsimony. (shrink)

Both Jacques and Raïssa Maritain produced large and diverse bodies of writing, and their creative lives spanned decades and encompassed the most turbulent periods of the twentieth century. Scholarly engagement with their work continues to reap new insights, and that includes engagement with the writings produced in the earlier portions of their respective careers. Those earlier portions were themselves remarkably productive, and issued not only in important writings but also in profoundly influential professional and personal relationships nurtured and developed with (...) a truly diverse array of scholars, clergy, and artists, including such figures as Henri Bergson, Leon Bloy, Ernest Psichari, and Georges Rouault. This new anthology of essays manages both to interact with the biographies and writings of the Maritains themselves (and to a degree their close early associates) and also to contribute to novel Thomistic reflection on themes from their early careers, among them war, suffering, politics, art, intuition, and foundational issues in moral theology. The essays are historically informed yet address perennial issues of vital significance for the life of the Church and the broader culture. The contributing authors are Prudence Allen, John Deely, Elizabeth Jane Doering, Heather Erb, Doug Flippen, Heidi Giebel, Ben Huff, James Jacobs, Florian Michel, Mark Moes, Brenna Moore, Bernadette OConnor, Matthew Pugh, James V. Schall, Joshua Schulz, Daniel Shields, Michael Torre, and John Wippel. (shrink)