We argue that explainable artificial intelligence (XAI), specifically reason-giving XAI, often constitutes the most suitable way of ensuring that someone can properly be held responsible for decisions that are based on the outputs of artificial intelligent (AI) systems. We first show that, to close moral responsibility gaps (Matthias 2004), often a human in the loop is needed who is directly responsible for particular AI-supported decisions. Second, we appeal to the epistemic condition on moral responsibility to argue that, in order to (...) be responsible for her decision, the human in the loop has to have an explanation available of the system’s recommendation. Reason explanations are especially well-suited to this end and we examine whether – and how – it might be possible to make such explanations fit with AI systems. We support our claims by focusing on a case of disagreement between human in the loop and AI system. (shrink)

Phenomenology as practised by Adolf Reinach ( 1883-191 7) in his all too brief philosophical career exemplifies all the virtues of Husserl's Logical Investigations. It is sober, concerned to be clear and deals with specific problems. It is therefore understandable that, in a philosophical climate in which Husserl's masterpiece has come to be regarded as a mere stepping stone on the way to his later Phenomeno logy, or even to the writings of a Heidegger, Reinach's contributions to exact philo sophy (...) have been all but totally forgotten. The topics on which Reinach wrote most illuminatingly, speech acts (which he called 'social acts') and states of affairs (Sachverhalte ), as well as his realism about the external world, have come to be regarded as the preserve of other traditions of exact philosophy. Like my fellow contributors, I hope that the present volume will go some way towards correcting this unfortunate historical accident. Reinach's account of judgements and states of affairs, an account that precedes those of Russell and Wittgenstein, his 1913 treatment of speech acts, his reinter pretation of Hume and aspects of his legal philosophy are the main philosophical topics dealt with in what follows. But his analysis of deliberation as well as his work on movement and Zeno's paradoxes get only a passing mention. (shrink)

What's wrong with targeted advertising in political campaigns? Are echo chambers a matter of genuine concern? How does data collection impact on trust in society? As decision-making becomes increasingly automated, how can decision-makers be held to account? This collection consider potential solutions to these challenges.

In the case of ventriloquism, seeing the movement of the ventriloquist dummy’s mouth changes your experience of the auditory location of the vocals. Some have argued that cases like ventriloquism provide evidence for the view that at least some of the content of perception is fundamentally multimodal. In the ventriloquism case, this would mean your experience has constitutively audio-visual content (not just a conjunction of an audio content and visual content). In this paper, I argue that cases like ventriloquism do (...) not in fact warrant that conclusion. I then try to make sense of crossmodal cases without appealing to fundamentally multimodal content. (shrink)

We are grateful to the commentators for taking the time to respond to our article. Too many interesting and important points have been raised for us to tackle them all in this response, and so in the below we have sought to draw out the major themes. These include problems with both the term ‘ultimate causation’ and the proximate-ultimate causation dichotomy more generally, clarification of the meaning of reciprocal causation, discussion of issues related to the nature of development and phenotypic (...) plasticity and their roles in evolution, and consideration of the need for an extended evolutionary synthesis. (shrink)

Ernst Mach's atomistic theory of sensation faces problems in doing justice to our ability to perceive and remember complex phenomena such as melodies and shapes. Christian von Ehrenfels attempted to solve these problems with his theory of "Gestalt qualities", which he sees as entities depending one-sidedly on the corresponding simple objects of sensation. We explore the theory of dependence relations advanced by Ehrenfels and show how it relates to the views on the objects of perception advanced by Husserl and by (...) the Gestalt psychologists. (shrink)

Lewis signaling games illustrate how language might evolve from random behavior. The probability of evolving an optimal signaling language is, in part, a function of what learning strategy the agents use. Here we investigate three learning strategies, each of which allows agents to forget old experience. In each case, we find that forgetting increases the probability of evolving an optimal language. It does this by making it less likely that past partial success will continue to reinforce suboptimal practice. The learning (...) strategies considered here show how forgetting past experience can promote learning in the context of games with suboptimal equilibria. (shrink)

Americans today don't trust each other and their institutions as much as they once did, fueling destructive ideological conflicts and hardened partisanship. In Trust in a Polarized Age, political philosopher Kevin Vallier argues that to build social trust and reduce polarization, we must strengthen liberal democratic institutions--high-quality governance, procedural fairness, markets, social welfare programs, freedom of association, and democracy. These institutions not only create trust, they do so justly, by recognizing and respecting our basic rights.

This essay proposes a theory of the nature and logic of truth on which truth is an inconsistent concept that should be replaced for certain theoretical purposes. The paradoxes associated with truth (for example, the liar) and the pattern of failures in our attempts to deal with them suggest that truth is an inconsistent concept. The first part of the essay describes a pair of replacement concepts, which the essay dubs ascending truth and descending truth, along with an axiomatic theory (...) of them and an empirical interpretation of the theory. The essay shows how to use these replacements in a familiar truth-conditional semantics as well. The second part of the essay offers a descriptive theory of our natural language truth predicate that takes it to be assessment sensitive, which means that it has the same content in every context of utterance, but its extension (that is, the set of things that are true) depends on a context of assessment. Contexts of assessment model situations in which a person interprets someone's utterance. From different contexts of assessment, the truth predicate has different extensions. The descriptive theory employs the concepts of ascending truth and descending truth, and they determine how the extension of the truth predicate varies across contexts of assessment. This assessment-sensitive theory of truth solves the liar and other paradoxes, it is compatible with classical logic and all the expressive resources we have in natural language, and it does not give rise to any new paradoxes. (shrink)

Presents a new way of looking at what it means to be human, offering a convincing case that humans are more than immaterial souls or "biological computers".

In seeking to explain the evolution of social cooperation, many scholars are using increasingly complex game-theoretic models. These complexities often model readily observable features of human and animal populations. In the case of previous games analyzed in the literature, these modifications have had radical effects on the stability and efficiency properties of the models. We will analyze the effect of adding spatial structure to two communication games: the Lewis Sender-Receiver game and a modified Stag Hunt game. For the Stag Hunt, (...) we find that the results depart strikingly from previous models. In all cases, the departures increase the explanatory value of the models for social phenomena. (shrink)

I provide a method of measuring the inconsistency of a set of sentences from 1-consistency, corresponding to complete consistency, to 0-consistency, corresponding to the explicit presence of a contradiction. Using this notion to analyze the lottery paradox, one can see that the set of sentences capturing the paradox has a high degree of consistency (assuming, of course, a sufficiently large lottery). The measure of consistency, however, is not limited to paradoxes. I also provide results for general sets of sentences.

Movements like the Arab Spring, Occupy Wall Street, and the Tea Party embody some of our deepest intuitions about popular politics and 'the power of the people'. They also expose tensions and shortcomings in our understanding of these ideals. We typically see 'the people' as having a special, sovereign power. Despite the centrality of this idea in our thinking, we have little understanding of why it has such importance. Imagined Sovereignties probes the considerable force that 'the people' exercises on our (...) thought and practice. Like the imagined communities described by Benedict Anderson, popular politics is formed around shared, imaginary constructs rooted in our collective imagination. This book investigates these 'imagined sovereignties' in a genealogy traversing the French Enlightenment, the Haitian Revolution, and nineteenth-century Haitian constitutionalism. It problematizes taken-for-granted ideas about popular politics and provokes new ways of imagining the power of the people. (shrink)

In typesetting the final version of this paper, an error was introduced in the formal notation. Dots used for multiplication were replaced by ampersands. Although this does not affect the result, it could be confusing for readers. The publisher and editors apologise for the error. This error has been corrected. -/- .

In current debates about moral responsibility, it is common to differentiate two fundamentally different incompatibilist positions: Leeway Incompatibilism and Source Incompatibilism. The present paper argues that this is a bad dichotomy. Those forms of Leeway Incompatibilism that have no appeal to ‘origination’ or ‘ultimacy’ are problematic, which suggests that incompatibilists should prefer Source Incompatibilism. Two sub-classifications of Source Incompatibilism are then differentiated: Narrow Source Incompatibilism holds that alternative possibilities are outside the scope of what is required for moral responsibility, and (...) Wide Source Incompatibilism holds that while ultimacy is most fundamental to moral responsibility, an agent meeting the ultimacy condition will also have alternative possibilities, thereby also satisfying an alternative possibilities condition. The present paper argues that the most promising incompatibilist positions will be versions of Wide Source Incompatibilism. (shrink)

Models of moral responsibility rely on foundational views about moral agency. Many scholars believe that only humans can be moral agents, and therefore business needs to create models that foster greater receptivity to others through ethical dialog. This view leads to a difficulty if no specific person is the sole causal agent for an act, or if something comes about through aggregated action in a corporate setting. An alternate approach suggests that corporations are moral agents sufficiently like humans to be (...) treated as persons, which leads to questions of intentionality and the organizational structure required to support the claim. In this article, I make an intermediate claim combining Goodpaster and Matthews' (60:132–141, 1982 ) view that a corporation may have a moral culture which affects subjective choices, with those of Painter-Morland (17(3):515–534, 2007 ) who points out that we should move from a model that posits discrete persons acting on each other to one where morality comes about through shared experience between agents who participate in each other’s lives. I argue that the discussion has been trapped in traditional dichotomies, and is better served by language that more accurately represents the dynamic interplay between organization and individual. I underwrite this claim by looking at recent changes in British and American legal approaches to corporate responsibility. These provide greater incentives for owners and business leaders to encourage employees to discuss the reflexive nature of legal and moral responsibility in business, facilitate workers to voice their moral concerns, and create structures and processes that allow those concerns to be heard. (shrink)

ABSTRACT In a series of papers read to the Cambridge Philosophical Society through the 1820s, the Cambridge mathematician George Peacock laid the foundation for a natural history of arithmetic that would tell a story of human progress from counting to modern arithmetic. The trajectory of that history, Peacock argued, established algebraic analysis as a form of universal reasoning that used empirically warranted operations of mind to think with symbols on paper. The science of counting would suggest arithmetic, arithmetic would suggest (...) arithmetical algebra, and, finally, arithmetical algebra would suggest symbolic algebra. This philosophy of suggestion provided the foundation for Peacock's “principle of equivalent forms,” which justified the practice of nineteenth-century English symbolic algebra. Peacock's philosophy of suggestion owed a considerable debt to the early Cambridge Philosophical Society culture of natural history. The aim of this essay is to show how that culture of natural history was constitutively significant to the practice of nineteenth-century English algebra. (shrink)

David Bohm is a physicist with a broad range of other interests including religion, philosophy, education, art, and linguistics. This book surveys Bohm's physical theories including the quantum potential theory and the implicate order or holomovement theory.

There is renewed interest in the logic of discovery as well as in the position that there is no reason for philosophers to bother with it. This essay shows that the traditional, philosophical arguments for the latter position are bankrupt. Moreover, no interesting defense of the philosophical irrelevance or impossibility of the logic of discovery can be formulated or defended in isolation from computation-theoretic considerations.

Reasoners compare problems to prior cases to draw conclusions about a problem and guide decision making. All Case-Based Reasoning (CBR) employs some methods for generalizing from cases to support indexing and relevance assessment and evidences two basic inference methods: constraining search by tracing a solution from a past case or evaluating a case by comparing it to past cases. Across domains and tasks, however, humans reason with cases in subtly different ways evidencing different mixes of and mechanisms for these components.In (...) recent CBR research in Artificial Intelligence (AI), five paradigmatic approaches have emerged: statistically-oriented, model-based, planning/design-oriented, exemplar-based, and adversarial or precedent-based. The paradigms differ in the assumptions they make about domain models, the extent to which they support symbolic case comparison, and the kinds of inferences for which they employ cases. (shrink)

In Radical Skepticism & Epistemic Intuition Michael Bergmann attempts to overcome the threat of radical skepticism as it arises in several different forms. The key to Bergmann’s response to skepticism is his method of intuitionist particularism wherein we give our intuitions about particular beliefs being justified more weight than we do intuitions about the premises of arguments for skepticism. There are two general problems for Bergmann’s response to skepticism. First, he fails to accurately portray the key principle of the skeptical (...) argument. As a result, much of the apparent motivation for looking to intuitionist particularism as opposed to other responses to skepticism is merely apparent. Second, intuitionist particularism faces significant problems when it comes to the Problem of the Criterion and the resolution of conflicting intuitions. However, a related intuitionist method, one incorporating explanationism, may be able to deliver what intuitionist particularism promises while avoiding its problems. (shrink)

This book makes accessible, to a wide audience, the thought of Evagrius and Gregory on the soul, in the context of ancient philosophy/theology and the Cappadocians generally. Corrigan argues that in these two figures we witness the birth of new forms of thought and of empirical science in a new key. Evagrius and Gregory are no mere receivers of a monolithic pagan and Christian tradition, but innovative, critical interpreters on the range and limits of cognitive psychology, the soul-body relation, reflexive (...) self-knowledge, personal and human identity and the soul's practical relation to goodness in the context of human experience and divine self-disclosure. This book provides a critical evaluation of their thought on these major issues and argues that in Evagrius and Gregory we see the important integration of many different concerns that later Christian thought was not always able to balance including: mysticism, asceticism, cognitive science, philosophy, and theology. (shrink)

The essays by Allen et al and Peterson present a number of challenges to readers of this volume. For some, the theoretical framework for ecosystem management that is endorsed by the authors – a variant of what may be called the “ecosystem approach to ecosystem management ” – will be unfamiliar, and there.

This paper aims at a cross-cultural comparison between friendship in Aristotle and friendship in Buddhist traditions. Aristotle’s thorough analysis of friendship results in Buddhist concepts of friendship necessarily a sub-category as Aristotle deems friendship within religious communities to be a niche category of friendship. Although Buddhist notions of love and compassion are universally prescribed, monastic friendship is necessarily highly selective to be between like-minded individuals within a Buddhist community pursuing the shared end of enlightenment. Buddhism however offers three categories of (...) friendship: lay community friendship, monastic friendship and spiritual friendship. Buddhism, therefore, while unavoidably a sub-category of Aristotelian concepts of friendship, reveal nuanced approaches to friendship depending on an individual’s place in the Buddhist tradition. (shrink)

If a painting or a sculpture needs to be supplemented and explained by words, it means either that it has not fulfilled its function or that the public is deprived of vision. They had manufactured a technology of universal incomprehension. If one is uncomfortable with a commitment one’s theory is saddled with . . . one must reformulate one’s theory. These three citations define the scope and interest of my argument regarding twentieth-century formalist art and visual communication. Formalist art “needs (...) to be supplemented and explained in words” (Gabo) regarding reference and meaning and therefore fails as visual media, because formalists unwittingly “manufactured a technology of .. (shrink)

We model the impact of different incentives on journal behavior in undertaking peer review. Under one scheme, the journal aims to publish the highest-quality papers; under the second, the journal aims to maintain a high rejection rate. Under both schemes, journals prefer to set very high standards for acceptance despite allowing significant error in peer review. Under the second scheme, however, in order to encourage more submissions of mediocre papers, the journal is incentivized to make its editorial process less accurate. (...) This leads to both worse peer review and lower-quality articles being published. (shrink)

We tend to imagine revolution as a vivid tableau of uprisings and armed conflicts. Much less notice is taken of the complex layers of meaning that shape our understanding of these events: why some are seen as just expressions of a popular will, while others are condemned as wild disruptions of political order. A critical understanding of politics must grapple with these subtle, often unnoticed normative issues. This essay tries to understand some of the processes that create political normativity, investigating (...) the way revolutionary movements use time to endow themselves with normative value. I sketch a genealogy of revolution across three centuries, noting changes in its meaning, observing the rise of discourse as an important mode of revolutionary activity, and tracing a shifting mosaic of temporalities that are politicized in important ways. Time is instrumentalized to justify political insurgency in this history. Time, in short, becomes a tool of revolution. (shrink)

In 2014, I published a proposal for a definition of “religion”. My goal was to offer a definition of this contentious term that would include Buddhism, Daoism, and other non-theistic forms of life widely considered religions in the contemporary world. That proposal suggested necessary and sufficient conditions for treating a form of life as a religious one. It was critiqued as too broad, however, on the grounds that it would include the study of math as a religion. How can one (...) include forms of life based on non-theistic realities without including math? In this paper, I show the flaw in the previous definition and the weaknesses of two attempts to evade that flaw, before recommending a shift, first, to a Wittgenstein-inspired polythetic definition of “religion” and, second, to a certain kind of polythetic definition that I call “anchored”. (shrink)

An increasing number of automated and artificially intelligent (AI) systems make medical treatment recommendations, including “personalized” recommendations, which can deviate from standard care. Legal scholars argue that following such nonstandard treatment recommendations will increase liability in medical malpractice, undermining the use of potentially beneficial medical AI. However, such liability depends in part on lay judgments by jurors: When physicians use AI systems, in which circumstances would jurors hold physicians liable? To determine potential jurors’ judgments of liability, we conducted an online (...) experimental study of a nationally representative sample of 2,000 U.S. adults. Each participant read one of four scenarios in which an AI system provides a treatment recommendation to a physician. The scenarios varied the AI recommendation (standard or nonstandard care) and the physician’s decision (to accept or reject that recommendation). Subsequently, the physician’s decision caused a harm. Participants then assessed the physician’s liability. Our results indicate that physicians who receive advice from an AI system to provide standard care can reduce the risk of liability by accepting, rather than rejecting, that advice, all else equal. However, when an AI system recommends nonstandard care, there is no similar shielding effect of rejecting that advice and so providing standard care. The tort law system is unlikely to undermine the use of AI precision medicine tools and may even encourage the use of these tools. (shrink)

: This paper examines the epistemological warrant for a toxicological phenomenon known as chemical hormesis. First, it argues that conceptual confusion contributes significantly to current disagreements about the status of chemical hormesis as a biological hypothesis. Second, it analyzes seven distinct concepts of chemical hormesis, arguing that none are completely satisfactory. Finally, it suggests three ramifications of this analysis for ongoing debates about the epistemological status of chemical hormesis. This serves as a case study supporting the value of philosophical methodologies (...) such as conceptual clarifica-tion for addressing contemporary scientific disputes, including policy-related scientific disputes that may be heavily in(integral)uenced by social and political factors. (shrink)

I present two measures of information for both consistentand inconsistent sets of sentences in a finite language ofpropositional logic. The measures of information are based onmeasures of inconsistency developed in Knight (2002).Relative information measures are then provided corresponding to thetwo information measures.

This essay follows Michel Foucault’s inspiration to develop an archaeology of subaltern politics. In the archives left from the Haitian Revolution, we find occasional references to slaves wearing the tricolor cockade, the famous symbol of French republicanism. The archives are silent on what wearing the cockade “meant,” however, or why whites found it so threatening. Rich layers of meaning are packed into these silences. They reveal a great deal about the performative character of the public sphere and the epistemological complexity (...) of mixing race with revolutionary politics. Wearing the cockade was a screen of projection for all kinds of ideas, including the paranoid fears and guilty conscience of white slaveholders. It probed tensions implicit within Enlightenment colonialism, making those tensions explicit to white elites. By eliciting this self-critical response, the cockade served as a disruptive enigma well suited to the critical and political needs of people not allowed to speak. (shrink)

In his recent _The Parmenidean Ascent_, Michael Della Rocca develops a regress-theoretic case, reminiscent of F. H. Bradley’s famous argument in _Appearance and Reality_, against the intelligibility of relations and in favor of a monistic conception of reality. I argue that Della Rocca illicitly supposes that “internal” relations — in one sense of that word — lead to a “chain” regress, a regress of relations relating relations and relata. In contrast, I contend that if “internal” or grounded relations lead to (...) a regress at all, it is a kind of “fission” regress within the relata themselves, and that a chain regress for relations only arises, if at all, for so-called “external” relations, relations not grounded in their relata. In this way, I contend that Della Rocca pursues a regress for so-called “internal” or grounded relations that only arise, if at all, for so-called “external” relations, relations not grounded in their relata. I compare Della Rocca’s case against relations with Bradley’s reasoning in _Appearance and Reality_ and suggest in this context that Bradley may, perhaps, have the upper hand. (shrink)

Researchers have long debated the extent to which an individual’s skin tone influences their perceived race. Brooks and Gwinn demonstrated that the race of surrounding faces can affect the perceived skin tone of a central target face without changing perceived racial typicality, suggesting that skin lightness makes a small contribution to judgments of race compared to morphological cues. However, the lack of a consistent light source may have undermined the reliability of skin tone cues, encouraging observers to rely disproportionately on (...) morphological cues instead. The current study addresses this concern by using 3D models of male faces with typically Black African or White European appearances that are illuminated by the same light source. Observers perceived target faces surrounded by White faces to have darker skin than those surrounded by Black faces, particularly for faces of intermediate lightness. However, when asked to judge racial typicality, a small assimilation effect was evident, with target faces perceived as more stereotypically White when surrounded by White than when surrounded by Black faces at intermediate levels of typicality. This evidence of assimilation effects for perceived racial typicality despite concurrent contrast effects on perceived skin lightness supports the previous conclusion that perceived skin lightness has little influence on judgments of racial typicality for racially ambiguous faces, even when lighting is consistent. (shrink)

A truly inclusive democratic politics must be understandable, or cognitively tractable, for ordinary people busy with the rest of their lives. This extends not only to everyday politics and policy, but to constitutional politics as well—non-specialist democratic citizens should be able to grasp the fundamental law that governs them and imagine their own role in shaping it as political agents. Yet these requirements raise a difficulty: in many countries, including the United States, constitutions are treated as the exclusive domain of (...) lawyers and judges. As a result, constitutional matters are typically discussed using legalistic jargon that is inscrutable even to non-specialist lawyers, let alone ordinary citizens. How then can constitutional politics be made legible to ordinary citizens? In this essay, I argue this challenge is partly one of political ideas—specifically, the ideas ordinary citizens use to think about their constitutions, or their folk constitutionalism. This may sound strange because insofar as constitutions are treated as lawyers’ exclusive turf, the problem may seem to be one of practice, not merely ideas. But popular practices of what scholars like John Finn and Elizabeth Beaumont call popular or civic constitutionalism involve citizens and social movements in transforming constitutions. These transformations often occur behind the backs of everyone involved, as new frames and understandings come to gradually transmute constitutional meaning, which in turn pervades the public political culture and reshapes the public’s constitutional imagination. I suggest we need ideas that more closely reflect what democratic citizens already do in democratic constitutional politics, so that they can do it more self-consciously and dispel the impression of an anti-democratic lack of control that recent constitutional innovations reveal to be illusory. I explore the utility of ideas of unwrittenness and functional multi-textuality to the end of a folk constitutionalism appropriate for democracy. (shrink)

This essay examines the ways in which objectivity and realism have been conceived in the history of Western ethics and meta-ethics, and looks to classical Daoism for an alternative framework.

A question as old as the study of rhetoric itself, how we might conceive of the ethical basis of persuasion, is as pressing an issue today as ever. One of the earliest critiques of rhetoric comes from Plato's Phaedrus, in which rhetoric is likened to lust, seduction, domination, and even rape in its stance toward the other. Indeed, rhetorical scholarship has remained in contestation with these depictions of rhetoric as akin to coercion and violence.1 Unable to shake Plato's damning criticisms, (...) Plato has become a perpetual interlocutor and sparring partner in the debate regarding rhetorical ethics, leaving rhetorical scholars, as Michael Dues and Mary Brown claim, "boxing Plato's shadow" in attempts to... (shrink)

In the context of strategic interactions, individuals sometimes find themselves better off when they have fewer options. This mechanism is known under the name of ‘strategic commitment’, as it is usually the individuals themselves who ‘commit’ to following a certain course of action by restricting their options; but that is not necessary. I explain how a paternalistic intervention may be conceived where it is a third party who paternalistically restricts rational individuals’ choices to improve their welfare. This kind of intervention, (...) which I call ‘strategic paternalism’, contradicts the narrative according to which welfare economics is incompatible with paternalism because it assumes individual rationality, which would make paternalism irrelevant. To prove this point, I show why and in what sense this ‘strategic paternalism’ deserves to be called that way. (shrink)

Kevin Hill's highly original new interpretation of Nietzsche's philosophy is the first to examine in detail his debt to Kant, in particular the Critique of Pure Reason, Critique of Practical Reason, and Critique of Judgement. Nietzsche, Hill argues, knew Kant far better than is commonly thought, and can only be thoroughly understood in relation to Kant.Nietzsche's Critiques maintains that beneath the surface of his texts there is a systematic commitment to a form of early Neo-Kantianism in metaphysics and epistemology, (...) ethics, and aesthetics, grounded in his reading of the three Critiques, Kuno Fischer's commentary on the first Critique, and Friedrich Lange's discussion of Kant in The History of Materialism. The book also documents the decisive influence Nietzsche's close reading of the Critique of Judgement had on the writing of the Birth of Tragedy, and offers a remarkably accessible interpretation of Kant's system, while clarifying such difficult issues as the interpretation of Kant's 'Transcendental Deduction' and his notion of reflective judgement.Lucid and thorough, Hill's work will be of great value to scholars and students with interests in either of these philosophical giants, or in the history of ideas generally. (shrink)