In recent years Structural Realism has been revived as a compromise candidate to resolve the long-standing question of scientific realism. Recent debate over structural realism originates with Worrall's (1989) paper "Structural Realism: The best of Both Worlds". However, critics such as Psillos contend that structural realism incorporates an untenable distinction between structure and nature, and is therefore unworkable. In this paper I consider three versions of structural realism that purport to avoid such criticism. The first is Chakravartty's "semirealism" which proceeds (...) by trying to show that structural realism and entity realism entail one another. I demonstrate that this position will not work, but follow Chakravartty's contention that structural realism need not imply that scientific knowledge can only be of mathematical structure. I advance from this conclusion to sketch a version of structural realism that is consistent with recent deflationary approaches to the scientific realism question. Finally, I consider a third approach to structural realism Ladyman's "metaphysical structural realism" which tries to avoid the difficulties of earlier versions by taking structure to be ontologically primary. I show that the deflationary approach to structural realism undermines the rationale behind Ladyman's approach. (shrink)

In recent years Structural Realism has been revived as a compromise candidate to resolve the long-standing question of scientific realism. Recent debate over structural realism originates with Worrall’s (1989) paper “Structural Realism: The best of Both Worlds”. However, critics such as Psillos contend that structural realism incorporates an untenable distinction between structure and nature, and is therefore unworkable. In this paper I consider three versions of structural realism that purport to avoid such criticism. The first is Chakravartty’s “semirealism” which proceeds (...) by trying to show that structural realism and entity realism entail one another. I demonstrate that this position will not work, but follow Chakravartty’s contention that structural realism need not imply that scientific knowledge can only be of mathematical structure. I advance from this conclusion to sketch a version of structural realism that is consistent with recent deflationary approaches to the scientific realism question. Finally, I consider a third approach to structural realism Ladyman’s “metaphysical structural realism” which tries to avoid the difficulties of earlier versions by taking structure to be ontologically primary. I show that the deflationary approach to structural realism undermines the rationale behind Ladyman’s approach. (shrink)

In this paper I consider two accounts of scientific discovery, Robert Hudson's and Peter Achinstein's. I assess their relative success and I show that while both approaches are similar in promising ways, and address experimental discoveries well, they could address the concerns of the discovery sceptic more explicitly than they do. I also explore the implications of their inability to address purely theoretical discoveries, such as those often made in mathematical physics. I do so by showing that extending Hudson's or (...) Achinstein's account to such cases can sometimes provide a misleading analysis about who ought to be credited as a discoverer. In the final sections of the paper I work out some revisions to the Hudson/Achinstein account by drawing from a so-called structural realist view of theory change. Finally, I show how such a modified account of discovery can answer sceptical critics such as Musgrave or Woolgar without producing misleading analyses about who ought to receive credit as a discoverer in cases from the mathematical sciences. I illustrate the usefulness of this approach by providing an analysis of the case of the discovery of the Casimir effect. (shrink)

In recent years several philosophers have sought a defense for scientific realism in Bachelard's work. Two notable examples are Garry Gutting and Mary Tuiattas. This paper shows that such views are based on systematic miss-readings of some of Bachelard's main concepts. The main realist approach has been to show that Bachelard's idea of "phenomeno techniques" corresponds with Nacting's experimental realism. This paper corrects that thesis. In addition to correcting some readings of Bachelard, if this paper is correct, that approach to (...) defending scientific realism is ruled out. (shrink)

Book reviews in this journal usually proceed by considering the value of the book in question for Dewey scholarship. In this case I would rather say that this book is of interest to Dewey scholars. Jackson’s general project is heavily informed by Dewey’s pluralistic brand of pragmatism. As Jackson notes “Dewey’s Logic . . . stand[s] firmly in the tradition leading to this book” (216). Dewey scholars will greet Jackson’s extension of this approach to the study of international relations warmly. (...) Over the last thirty years, international relations specialists have debated the merits of a variety of methodological and philosophical options while at the same time a dominant theme has been to make the field .. (shrink)

To investigate the unique kinds of mentality involved in skilled performance, this paper explores the performance ecology of the Māori haka, a ritual form of song and dance of the indigenous people of Aotearoa New Zealand. We respond to a recent proposal to program robots to perform a haka as ‘cultural preservationists’ for ‘intangible cultural heritage’. This ‘Robot Māori Haka’ proposal raises questions about the nature of skill and the transmission of embodied knowledge; about the cognitive and affective experiences cultivated (...) in indigenous practices like haka; and about the role of robots in the archival aspirations of human societies. Reproducing haka, we suggest, requires more than copying physical actions; preserving the ‘intangible’ entails more than programming postures and movements. To make this case, we discuss the history of European responses to the haka, and analyse its diverse performance features in cultural context. Arguing that indigenous movement practices incorporate genuinely embodied knowledge, we claim that skilled performance of haka is deeply mindful, embodying and transmitting dynamic, culturally shared understandings of the natural and social world. The indigenous psychologies incorporated in haka performance are animated by a shared history integrated with its environment. Examining haka performance through the lens of 4E cognitive skill theory for mutual benefit, we discuss the effects of synchrony in collective action, the social and environmental scaffolding of affect and emotion, and the multilayered relations between past and present. Culturally-embedded systems of skilled movement like the Māori haka may, we suggest, constitute specific ways of thinking and feeling. (shrink)

In this book Daniel Wegner offers a novel understanding of the relation of consciousness, the will, and our intentional and voluntary actions. Wegner claims that our experience and common sense view according to which we can influence our behavior roughly the way we experience that we do it is an illusion.

This collection of essays explores the metaphysical thesis that the living world is not made up of substantial particles or things, as has often been assumed, but is rather constituted by processes. The biological domain is organised as an interdependent hierarchy of processes, which are stabilised and actively maintained at different timescales. Even entities that intuitively appear to be paradigms of things, such as organisms, are actually better understood as processes. Unlike previous attempts to articulate processual views of biology, which (...) have tended to use Alfred North Whitehead’s panpsychist metaphysics as a foundation, this book takes a naturalistic approach to metaphysics. It submits that the main motivations for replacing an ontology of substances with one of processes are to be found in the empirical findings of science. Biology provides compelling reasons for thinking that the living realm is fundamentally dynamic, and that the existence of things is always conditional on the existence of processes. The phenomenon of life cries out for theories that prioritise processes over things, and it suggests that the central explanandum of biology is not change but rather stability, or more precisely, stability attained through constant change. This edited volume brings together philosophers of science and metaphysicians interested in exploring the consequences of a processual philosophy of biology. The contributors draw on an extremely wide range of biological case studies, and employ a process perspective to cast new light on a number of traditional philosophical problems, such as identity, persistence, and individuality. (shrink)

Our ability to locate moral responsibility is often thought to be a necessary condition for conducting morally permissible medical practice, engaging in a just war, and other high-stakes endeavors. Yet, with increasing reliance upon artificially intelligent systems, we may be facing a wideningresponsibility gap, which, some argue, cannot be bridged by traditional concepts of responsibility. How then, if at all, can we make use of crucial emerging technologies? According to Colin Allen and Wendell Wallach, the advent of so-called ‘artificial moral (...) agents’ (AMAs) is inevitable. Still, this notion may seem to push back the problem, leaving those who have an interest in developing autonomous technology with a dilemma. We may need to scale-back our efforts at deploying AMAs (or at least maintain human oversight); otherwise, we must rapidly and drastically update our moral and legal norms in a way that ensures responsibility for potentially avoidable harms. This paper invokes contemporary accounts of responsibility in order to show how artificially intelligent systems might be held responsible. Although many theorists are concerned enough to develop artificial conceptions ofagencyor to exploit our present inability to regulate valuable innovations, the proposal here highlights the importance of—and outlines a plausible foundation for—a workable notion ofartificial moral responsibility. (shrink)

The potential to collect brain data more directly, with higher resolution, and in greater amounts has heightened worries about mental and brain privacy. In order to manage the risks to individuals posed by these privacy challenges, some have suggested codifying new privacy rights, including a right to “mental privacy.” In this paper, we consider these arguments and conclude that while neurotechnologies do raise significant privacy concerns, such concerns are—at least for now—no different from those raised by other well-understood data collection (...) technologies, such as gene sequencing tools and online surveillance. To better understand the privacy stakes of brain data, we suggest the use of a conceptual framework from information ethics, Helen Nissenbaum’s “contextual integrity” theory. To illustrate the importance of context, we examine neurotechnologies and the information flows they produce in three familiar contexts—healthcare and medical research, criminal justice, and consumer marketing. We argue that by emphasizing what is distinct about brain privacy issues, rather than what they share with other data privacy concerns, risks weakening broader efforts to enact more robust privacy law and policy. (shrink)

This book develops an Aristotelian account of the virtue of practical intelligence or "phronesis"--an excellence of deliberating and making choices--which ...

After 50 years of debate, the ethics of aggregation has reached a curious stalemate, with both sides arguing that only their theory treats people as equals. I argue that, on the issue of equality, both sides are wrong. From the premise that “each counts for one,” we cannot derive the conclusion that “more count for more”—or its negation. The familiar arguments from equality to aggregation presuppose more than equality: the Kamm/Scanlon “Balancing Argument” rests on what social choice theorists call “(Positive) (...) Responsiveness,” Kamm’s “Aggregation Argument” assumes that “equal” lives are fungible, and Hsieh et al. have it that spreading goods broadly best approximates equality. In each case, the crucial premise is not equality itself but a further idea that Taurek, I argue, can safely reject. I conclude with a conjecture: there is no theory-neutral argument that settles the question of whether the numbers count. (shrink)

Supporters of open borders sometimes argue that the state has no pro tanto right to restrict immigration, because such a right would also entail a right to exclude existing citizens for whatever reasons justify excluding immigrants. These arguments can be defeated by suggesting that people have a right to stay put. I present a new form of the exclusion argument against closed borders which escapes this “right to stay put” reply. I do this by describing a kind of exclusion that (...) has not been discussed in depth, which I call “territorial exclusion.” Territorial exclusion is the process according to which the group that wishes to exclude current citizens secedes from the territory in which those citizens reside. I argue that the wrongness of territorial exclusion explains why there is no pro tanto right for a state to exclude immigrants, because otherwise there would be a pro tanto right for the state to kick people out by seceding from the territory they inhabit. Because kicking people out like this is typically wrong, borders cannot be closed. (shrink)

I defend the cosmopolitan instrumentalist theory of secession, according to which a group has a right to secede only if this would promote cosmopolitan justice. I argue that the theory is preferable to other theories of secession because it is an entailment of cosmopolitanism, which is independently attractive, and because, unlike other theories of secession, it allows us to give the answers we want to give in cases like secession of the rich or secession that would make things worse for (...) minorities. I defend the view against the objections that it allows for colonialism and annexation, that it is not a distinct theory, and that it is impractical. (shrink)

While the contemporary philosophical literature is replete with discussion of the control or freedom required for moral responsibility, only more recently has substantial attention been devoted to the knowledge or awareness required, otherwise called the epistemic condition. This area of inquiry is rapidly expanding, as are the various positions within it. This chapter introduces two major positions: the reasonable expectation view and the quality of will view. The chapter then explores two dimensions of the epistemic condition that serve as fault (...) lines along which these two views diverge. The first dimension concerns different kinds of ignorance. The second concerns what agents can be directly blameworthy for. The chapter closes by sketching a novel approach that incorporates advantages of opposing positions on this topic. (shrink)

This paper argues that praise is governed by a norm of standing, namely the evaluative commitment condition. Even when the target of praise is praiseworthy and known to be so by the praiser, praise can be inappropriate owing to the praiser’s lacking the relevant evaluative commitment. I propose that uncommitted praisers lack the standing to praise in that, owing to their lack of commitment to the relevant value, they have not earned the right to host the co-valuing that is the (...) communicative aim of praise. (shrink)

Sexbots are coming. Given the pace of technological advances, it is inevitable that realistic robots specifically designed for people's sexual gratification will be developed in the not-too-distant future. Despite popular culture's fascination with the topic, and the emergence of the much-publicized Campaign Against Sex Robots, there has been little academic research on the social, philosophical, moral, and legal implications of robot sex. This book fills the gap, offering perspectives from philosophy, psychology, religious studies, economics, and law on the possible future (...) of robot-human sexual relationships. (shrink)

This chapter introduces readers to the view that praise is a form of address, or is communicative in the sense of seeking uptake from its target. The proposal that praise is communicative will seem counterintuitive if we take blame to be our paradigm of what it is for a responsibility-response to be communicative. This is because blame is communicative in a manner that intuitively presupposes some normative failure; it involves calling its target to account (or answer) for some wrongdoing. But, (...) the ‘rightdoer’ already properly regarded the relevant reasons in acting praiseworthily. So, there is nothing for which the praiseworthy agent must similarly account or answer for. How then could praise be communicative in sense of seeking uptake from its target? This chapter develops the view that praise is communicative in that it invites the praiseworthy agent to accept credit by co-valuing their action in the evaluative terms supplied by the praiser. This proposal is defended against three objections, namely that it is descriptively inadequate regarding our actual practices, that it is morally mistaken about when we owe others a response, and that it implies redundant communication. (shrink)

This chapter draws on insights from non-equilibrium thermodynamics to demonstrate the ontological inadequacy of the machine conception of the organism. The thermodynamic character of living systems underlies the importance of metabolism and calls for the adoption of a processual view, exemplified by the Heraclitean metaphor of the stream of life. This alternative conception is explored in its various historical formulations and the extent to which it captures the nature of living systems is examined. Following this, the chapter considers the metaphysical (...) implications of reconceptualizing the organism from complex machine to flowing stream. What do we learn when we reject the mechanical and embrace the processual? Three key lessons for biological ontology are identified. The first is that activity is a necessary condition for existence. The second is that persistence is grounded in the continuous self-maintenance of form. And the third is that order does not entail design. (shrink)

Wittgenstein famously remarks that ‘the meaning of a word is its use’ (PI §43). Whether or not one views this as gesturing at a ‘theory’ of meaning, or instead as aiming primarily at dissuading us from certain misconceptions of language that are a source of puzzlement, it is clear that Wittgenstein held that for certain purposes the meaning of an expression could profitably be characterised as its use. Throughout his later writings, however, Wittgenstein’s appeal to the notion of use pulls (...) in two directions. In several places, Wittgenstein seems to connect the notion of an expression’s meaning with that of use in the sense of usage or practice. More specifically, he suggests that for an expression to possess meaning is for there to be a practice of employing it according to certain rules. ‘That’, he tells us, ‘is why there exists a correspondence between the concepts “rule” and “meaning”’ (OC §62; cf. PG 68; PO 51; RFM VI §28; VW 103). Indeed, Wittgenstein goes so far as to say, ‘The rule-governed nature of our languages permeates our life’ (RC §303). Call the view that the meaning of an expression is determined by a general principle governing its use, rulism. (shrink)

In this volume of newly commissioned essays, leading moral philosophers offer a comprehensive overview of virtue ethics.

1. Happiness, then and now -- Happiness, eudaimonia, and practical reasoning -- Happiness as eudaimonia -- Happiness and virtuous activity -- New directions from old debates -- 2. Happiness then: the sufficiency debate -- Aristotle's case against the sufficiency thesis -- 3. Happiness now: rethinking the self -- Socrates' case for the sufficiency thesis -- Epictetus and the stoic self -- The Stoics' case for the sufficiency thesis -- The embodied conception of the self -- The embodied conception and psychological (...) well-being -- The Stoics' case against the embodied conception. (shrink)

This Handbook maps a central terrain of philosophy, and provides the definitive guide to it. An illustrious team of philosophers explore the concept of a reason to do or believe something, in order to determine what these reasons are and how they work. And they investigate the nature of 'normative' claims about what we ought to do or believe.

This article focuses on the main methods used in analytic metaphysics. It first considers five important sources of constraints on metaphysical theorizing: linguistic and conceptual analysis, consulting intuitions, employing the findings of science, respecting folk opinion, and applying theoretical virtues in metaphysical theory choice such as preferring simpler theories, or preferring more explanatory theories. It then examines the role of formal methods in metaphysics as well as the role of metaphysical communities, traditions, and the place of the history of metaphysics (...) in contemporary work. It also discusses the issue of whether metaphysics should be seen as an enterprise that will yield knowledge of metaphysical matters or whether it should have more modest epistemic goals. Finally, it explores the question of how much of metaphysics is a priori. (shrink)

A lot of philosophers engage in debates about what claims are “metaphysically necessary”, and a lot more assume with little argument that some classes of claims have the status of “metaphysical necessity”. I think we can usefully replace questions about metaphysical necessity with five other questions which each capture some of what people may have had in mind when talking about metaphysical necessity. This paper explains these five other questions, and then discusses the question “how much of metaphysics is metaphysically (...) necessary?”, and each of its five replacements. (shrink)

According to an influential recent view, S is propositionally justified in believing p iff S is in no position to know that S is in no position to know p. I argue that this view faces compelling counterexamples.

I argue that the phenomenon underlying Bernard Williams’ (1976) “agent-regret” is considerably broader than appreciated by Williams and others. Agent-regret— an anguished response that agents have for harms they have caused, even if faultlessly— I maintain, is a species of a more general response to harms that need not be one’s fault, but which nonetheless impact one’s practical identity in a special way. This broader genus includes as a species what I call “relation-regret”, a pained response to harm caused by (...) a person to whom one is intimately related, as a co-member of a group partly constitutive of one’s practical identity (e.g. one’s family). After providing an account of the moral psychology of relation-regret, I attend to its normative significance, proposing in particular that acceptance of relation-regret provides us with reasons for accepting a novel form of moral luck, namely associative luck: the luck of being vulnerable to responsibility-responses in virtue of one’s attachments to others, despite one’s personal faultlessness. (shrink)

As a strategy for exploring the relationship between understanding and knowledge, we consider whether epistemic luck – which is typically thought to undermine knowledge – undermines understanding. Questions about the etiology of understanding have also been at the heart of recent theoretical debates within epistemology. Kvanvig (2003) put forward the argument that there could be lucky understanding and produced an example that he deemed persuasive. Grimm (2006) responded with a case that, he argued, demonstrated that there could not be lucky (...) understanding. In this paper, we empirically examine how participants' patterns of understanding attributions line up with the predictions of Kvanvig and Grimm. We argue that the data challenge Kvanvig's position. People do not differentiate between knowing-why and understanding-why on the basis of proper etiology: attributions of knowledge and understanding involve comparable (and minimal) roles for epistemic luck. We thus posit that folk knowledge and understanding are etiologically symmetrical. (shrink)

I argue that there is a tension between two of the most distinctive theses of Sven Rosenkranz’s Justification as Ignorance: the central thesis concerning justification, according to which an agent has propositional justification to believe p iff they are in no position to know that they are in no position to know p and the desire to avoid logical omniscience by imposing only “realistic” idealizations on epistemic agents.

Ludwig Wittgenstein's notoriously elusive later writings are dominated by remarks on language. However, while the textual analysis of Wittgenstein's writings is presently a booming industry, the tendency is to focus narrowly on exegetical matters with little attention to their bearing on philosophy at large. Moreover, one finds in contemporary philosophy of language various ideas with a distinctively Wittgensteinian ring to them but whose pedigree is uncertain. This volume brings together distinguished Wittgenstein scholars and renowned philosophers of language in order to (...) examine just what Wittgenstein has to say about language and to assess its significance for current philosophy. The topics discussed include the connection between the meaning of a word and its use, the bearing the context of utterance has on how words are to be understood, the role of rules in the employment of language and whether Wittgenstein's reflections on these issues encourage sceptical or relativist thoughts."--BOOK JACKET. (shrink)

Majority rule is often regarded as an important democratic principle. But modern democracies divide voters into districts. So if the majority should rule, which majority should rule? Should it be the popular majority, or an electoral majority (i.e., either the majority of voters in the majority of districts, or the majority of voters in districts that contain the majority of the population)? I argue that majority rule requires rule by the popular majority. This view is not novel and may seem (...) obvious. But it is rarely defended, and often rejected. I defend it by arguing that this view about which majority should rule is best supported by the arguments for why the majority should rule, and best avoids the arbitrary and perverse verdicts of rule by electoral majorities. I close by considering the significant practical implications of the view. The Electoral College is often criticized on the basis that the winner of the popular vote doesn’t always win the election. But all district-based democracies have this feature, so all district-based democracies must be reformed if they are to satisfy the principle of majority rule. (shrink)

This paper seeks to carve out a distinctive category of conspiracy theorist, and to explore the process of becoming a conspiracy theorist of this sort. Those on whom I focus claim their beliefs trace back to simply trusting their senses and experiences in a commonsensical way, citing what they take to be authoritative firsthand evidence or observations. Certain flat Earthers, anti-vaxxers, and UFO conspiracy theorists, for example, describe their beliefs and evidence this way. I first distinguish these conspiracy theorists by (...) contrasting them with another group that has recently received a lot of attention from the media, philosophers, and academics more broadly. I then dig more deeply into the nature of these conspiracy theorists’ epistemic self-understanding, in order to give an account of the process by which one becomes such a conspiracy theorist. I conclude with some takeaways and implications: first, I explore the implications of my account for whether these conspiracy theorists’ beliefs are rational; then, I argue that my account has practical takeaways about counteracting beliefs in misinformation, since strategies appropriate to this kind of conspiracy theorist may not be the same ones that are appropriate for other kinds. (shrink)

This chapter sets out an optimistic view of philosophical progress. The key idea is that the historical record speaks in favor of there being progress at least if we are clear about what philosophical problems are, and what it takes to solve them. I end by asking why so many people tend toward a pessimistic view of philosophical progress.

This volume re-examines some of the major themes at the intersection of traditional and contemporary metaphysics. The book uses as a point of departure Francisco Suárez’s _Metaphysical Disputations_ published in 1597. Minimalist metaphysics in empiricist/pragmatist clothing have today become mainstream in analytic philosophy. Independently of this development, the progress of scholarship in ancient and medieval philosophy makes clear that traditional forms of metaphysics have affinities with some of the streams in contemporary analytic metaphysics. The book brings together leading contemporary metaphysicians (...) to investigate the viability of a neo-Aristotelian metaphysics. (shrink)

In this paper we compare two theories about the cognitive architecture underlying morality. One theory, proposed by Sripada and Stich (forthcoming), posits an interlocking set of innate mechanisms that internalize moral norms from the surrounding community and generate intrinsic motivation to comply with these norms and to punish violators. The other theory, which we call the M/C model was suggested by the widely discussed and influential work of Elliott Turiel, Larry Nucci and others on the “moral/conventional task”. This theory posits (...) two distinct mental domains, the moral and the conventional, each of which gives rise to a characteristic suite of judgments about rules in that domain and about transgressions of those rules. We give an overview of both theories and of the data each was designed to explain. We go on to consider a growing body of evidence that suggests the M/C model is mistaken. That same evidence, however, is consistent with the Sripada and Stich theory. Thus, we conclude that the M/C model does not pose a serious challenge for the Sripada and Stich theory. (shrink)

PurposeThe purpose of this paper is to show how both the presentation and limitation of visual choices in massively multiplayer online role‐playing games (MMORPG) avatar creation interfaces tends to exclude or favor different real life social groups.Design/methodology/approachA novel method combining both quantitative and critical analysis of the syntagmatic‐paradigmatic structure of MMORPG avatar creation interfaces is used to inform the findings of this study.FindingsThis study concludes that as cultural interfaces, current fantasy themed MMORPGs remediate socially exclusive values both from fantasy literature (...) and from their own game lore. The socially exclusive values deal largely with extreme and immutable racial and sexual dimorphism.Research limitations/implicationsInterfaces which present users with color palettes and/or smooth slider‐based body modifiers do not lend themselves well to this method of analysis. In addition to this, only a handful of the popular MMORPGs are analyzed within the body of this work.Practical implicationsThis paper demonstrates that MMORPG players and designers need to be more aware about how they are constructing and embedding social values in their worlds. Avatars are critical conduits for online social dynamics and embedding socially exclusive values may transfer negative ideologies from old media to new.Originality/valueThis paper offers one of the earliest critiques of embedded values in avatar creation interfaces of MMORPGs. The paper aims to begin discussion on an overlooked area of now popular media that has not received any critical attention regarding its embedded messages of social inclusiveness or exclusiveness. (shrink)

Having concepts is a distinctive sort of cognitive capacity. One thing that conceptual thought requires is obeying the Generality Constraint: concepts ought to be freely recombinable with other concepts to form novel thoughts, independent of what they are concepts of. Having concepts, then, constrains cognitive architecture in interesting ways. In recent years, spurred on by the rise of evolutionary psychology, massively modular models of the mind have gained prominence. I argue that these architectures are incapable of satisfying the Generality Constraint, (...) and hence incapable of underpinning conceptual thought. I develop this argument with respect to two well-articulated proposals, due to Dan Sperber and Peter Carruthers. Neither proposal gives us a satisfactory explanation of Generality within the confines of a genuinely modular architecture. Massively modular minds may display considerable behavioral and cognitive flexibility, but not humanlike conceptualized thought. (shrink)