To assess ethics pedagogy in science and engineering, we developed a new tool called the Engineering and Science Issues Test. ESIT measures moral judgment in a manner similar to the Defining Issues Test, second edition, but is built around technical dilemmas in science and engineering. We used a quasi-experimental approach with pre- and post-tests, and we compared the results to those of a control group with no overt ethics instruction. Our findings are that several stand-alone classes showed a significant improvement (...) compared to the control group when the metric includes multiple stages of moral development. We also found that the written test had a higher response rate and sensitivity to pedagogy than the electronic version. We do not find significant differences on pre- test scores with respect to age, education level, gender or political leanings, but we do on whether subjects were native English speakers. We did not find significant differences on pre- test scores based on whether subjects had previous ethics instruction; this could suggest a lack of a long-term effect from the instruction. (shrink)

The literature on self-driving cars and ethics continues to grow. Yet much of it focuses on ethical complexities emerging from an individual vehicle. That is an important but insufficient step towards determining how the technology will impact human lives and society more generally. What must complement ongoing discussions is a broader, system level of analysis that engages with the interactions and effects that these cars will have on one another and on the socio-technical systems in which they are embedded. To (...) bring the conversation of self-driving cars to the system level, we make use of two traffic scenarios which highlight some of the complexities that designers, policymakers, and others should consider related to the technology. We then describe three approaches that could be used to address such complexities and their associated shortcomings. We conclude by bringing attention to the “Moral Responsibility for Computing Artifacts: The Rules”, a framework that can provide insight into how to approach ethical issues related to self-driving cars. (shrink)

Robots are becoming an increasingly pervasive feature of our personal lives. As a result, there is growing importance placed on examining what constitutes appropriate behavior when they interact with human beings. In this paper, we discuss whether companion robots should be permitted to “nudge” their human users in the direction of being “more ethical”. More specifically, we use Rawlsian principles of justice to illustrate how robots might nurture “socially just” tendencies in their human counterparts. Designing technological artifacts in such a (...) way to influence human behavior is already well-established but merely because the practice is commonplace does not necessarily resolve the ethical issues associated with its implementation. (shrink)

An under-examined aspect of human–robot interaction that warrants further exploration is whether robots should be permitted to influence a user’s behavior for that person’s own good. Yet an even more controversial practice could be on the horizon, which is allowing a robot to “nudge” a user’s behavior for the good of society. In this article, we examine the feasibility of creating companion robots that would seek to nurture a user’s empathy toward other human beings. As more and more computing devices (...) subtly and overtly influence human behavior, it is important to draw attention to whether it would be ethically appropriate for roboticists to pursue this type of design pathway. Our primary focus is on whether a companion robot could encourage humans to perform charitable acts; this design possibility illustrates the range of socially just actions that a robot could potentially elicit from a user and what the associated ethical concerns may be. (shrink)

The primary aim of this article is to identify ethical challenges relating to authorship in engineering fields. Professional organizations and journals do provide crucial guidance in this realm, but this cannot replace the need for frequent and diligent discussions in engineering research communities about what constitutes appropriate authorship practice. Engineering researchers should seek to identify and address issues such as who is entitled to be an author and whether publishing their research could potentially harm the public.

This manuscript describes a pilot study in ethics education employing a problem-based learning approach to the study of novel, complex, ethically fraught, unavoidably public, and unavoidably divisive policy problems, called “fractious problems,” in bioscience and biotechnology. Diverse graduate and professional students from four US institutions and disciplines spanning science, engineering, humanities, social science, law, and medicine analyzed fractious problems employing “navigational skills” tailored to the distinctive features of these problems. The students presented their results to policymakers, stakeholders, experts, and members (...) of the public. This approach may provide a model for educating future bioscientists and bioengineers so that they can meaningfully contribute to the social understanding and resolution of challenging policy problems generated by their work. (shrink)

Many scholars predict that the technology to modify unborn children genetically is on the horizon. According to supporters of genetic enhancement, allowing parents to select a child’s traits will enable him/her to experience a better life. Following their logic, the technology will not only increase our knowledge base and generate cures for genetic illness, but it may enable us to increase the intelligence, strength, and longevity of future generations as well. Yet it must be examined whether supporters of genetic enhancement, (...) especially libertarians, adequately appreciate the ethical hazards emerging from the technology, including whether its use might violate the harm principle. (shrink)

To assess ethics pedagogy in science and engineering, we developed a new tool called the Engineering and Science Issues Test (ESIT). ESIT measures moral judgment in a manner similar to the Defining Issues Test, second edition, but is built around technical dilemmas in science and engineering. We used a quasi-experimental approach with pre- and post-tests, and we compared the results to those of a control group with no overt ethics instruction. Our findings are that several (but not all) stand-alone classes (...) showed a significant improvement compared to the control group when the metric includes multiple stages of moral development. We also found that the written test had a higher response rate and sensitivity to pedagogy than the electronic version. We do not find significant differences on pre-test scores with respect to age, education level, gender or political leanings, but we do on whether subjects were native English speakers. We did not find significant differences on pre-test scores based on whether subjects had previous ethics instruction; this could suggest a lack of a long-term effect from the instruction. (shrink)

Our courts are regularly confronted with the claims of expert witnesses. Since experts are permitted to present testimony in the courtroom, we have to assume that judges and juries understand what it means to have expertise and can consistently recognize someone who has it. Yet these assumptions need to be examined, for the legal system probably underestimates the difficulty of identifying expertise. In this paper, several philosophical issues pertaining to expertise will be discussed, including what expertise is, why we rely (...) on experts, what measures can be taken to verify expertise, and how we determine whether a particular individual is an expert. (shrink)

The crash of two 737 MAX passenger aircraft in late 2018 and early 2019, and subsequent grounding of the entire fleet of 737 MAX jets, turned a global spotlight on Boeing’s practices and culture. Explanations for the crashes include: design flaws within the MAX’s new flight control software system designed to prevent stalls; internal pressure to keep pace with Boeing’s chief competitor, Airbus; Boeing’s lack of transparency about the new software; and the lack of adequate monitoring of Boeing by the (...) FAA, especially during the certification of the MAX and following the first crash. While these and other factors have been the subject of numerous government reports and investigative journalism articles, little to date has been written on the ethical significance of the accidents, in particular the ethical responsibilities of the engineers at Boeing and the FAA involved in designing and certifying the MAX. Lessons learned from this case include the need to strengthen the voice of engineers within large organizations. There is also the need for greater involvement of professional engineering societies in ethics-related activities and for broader focus on moral courage in engineering ethics education. (shrink)

The purpose of this paper is to explore whether laypersons can competently evaluate the specialized claims offered by experts. Since it is a lack of knowledge about a subject area that makes someone a layperson with respect to that area, the layperson may be unable to understand and assess what an expert knows.

The use of robotic workers is likely to continue to increase as time passes. Hence it is crucial to examine the types of effects this occurrence could have on employment patterns. Invariably, as new job opportunities emerge due to robotic innovations, others will be closed off. Further, the characteristics of the workforce in terms of age, education, and income could profoundly change as a result.

Recently, there has been an upsurge of attention focused on bias and its impact on specialized artificial intelligence applications. Allegations of racism and sexism have permeated the conversation as stories surface about search engines delivering job postings for well-paying technical jobs to men and not women, or providing arrest mugshots when keywords such as “black teenagers” are entered. Learning algorithms are evolving; they are often created from parsing through large datasets of online information while having truth labels bestowed on them (...) by crowd-sourced masses. These specialized AI algorithms have been liberated from the minds of researchers and startups, and released onto the public. Yet intelligent though they may be, these algorithms maintain some of the same biases that permeate society. They find patterns within datasets that reflect implicit biases and, in so doing, emphasize and reinforce these biases as global truth. This paper describes specific examples of how bias has infused itself into current AI and robotic systems, and how it may affect the future design of such systems. More specifically, we draw attention to how bias may affect the functioning of a robot peacekeeper, a self-driving car, and a medical robot. We conclude with an overview of measures that could be taken to mitigate or halt bias from permeating robotic technology. (shrink)

As a committee of the National Academy of Engineering recognized, ethics education should foster the ability of students to analyze complex decision situations and ill-structured problems. Building on the NAE’s insights, we report about an innovative teaching approach that has two main features: first, it places the emphasis on deliberation and on self-directed, problem-based learning in small groups of students; and second, it focuses on understanding ill-structured problems. The first innovation is motivated by an abundance of scholarly research that supports (...) the value of deliberative learning practices. The second results from a critique of the traditional case-study approach in engineering ethics. A key problem with standard cases is that they are usually described in such a fashion that renders the ethical problem as being too obvious and simplistic. The practitioner, by contrast, may face problems that are ill-structured. In the collaborative learning environment described here, groups of students use interactive and web-based argument visualization software called “AGORA-net: Participate – Deliberate!”. The function of the software is to structure communication and problem solving in small groups. Students are confronted with the task of identifying possible stakeholder positions and reconstructing their legitimacy by constructing justifications for these positions in the form of graphically represented argument maps. The argument maps are then presented in class so that these stakeholder positions and their respective justifications become visible and can be brought into a reasoned dialogue. Argument mapping provides an opportunity for students to collaborate in teams and to develop critical thinking and argumentation skills. (shrink)

In this article, the authors examine whether and how robot caregivers can contribute to the welfare of children with various cognitive and physical impairments by expanding recreational opportunities for these children. The capabilities approach is used as a basis for informing the relevant discussion. Though important in its own right, having the opportunity to play is essential to the development of other capabilities central to human flourishing. Drawing from empirical studies, the authors show that the use of various types of (...) robots has already helped some children with impairments. Recognizing the potential ethical pitfalls of robot caregiver intervention, however, the authors examine these concerns and conclude that an appropriately designed robot caregiver has the potential to contribute positively to the development of the capability to play while also enhancing the ability of human caregivers to understand and interact with care recipients. (shrink)

The complexity of the interactions between humans and robots is increasing, and scholars predict that at some future point, robots will become caregivers and companions for children. This occurrence would raise many ethical issues, including what effects prolonged interactions with a robot may have on a child’s well-being. In this chapter, we discuss how robots could in principle be used to nurture the development of virtues in children by encouraging prosocial behavior and discouraging antisocial behavior.

Academic-industry collaborations and the conflicts of interest (COI) arising out of them are not new. However, as industry funding for research in the life and health sciences has increased and scandals involving financial COI are brought to the public’s attention, demands for disclosure have grown. In a March 2008 American Council on Science and Health report by Ronald Bailey, he argues that the focus on COI—especially financial COI—is obsessive and likely to be more detrimental to scientific progress and public health (...) than COI themselves. In response, we argue that downplaying the potential negative impact of COI arising out of academic-industry relationships is no less harmful than overreacting to it. (shrink)

This book is the first systematic treatment of 'responsibilist' or character-based virtue epistemology, an approach to epistemology that focuses on intellectual ...

Jason Stanley presents a startling and provocative claim about knowledge: that whether or not someone knows a proposition at a given time is in part determined by his or her practical interests, i.e. by how much is at stake for that person at that time. In defending this thesis, Stanley introduces readers to a number of strategies for resolving philosophical paradox, making the book essential not just for specialists in epistemology but for all philosophers interested in philosophical methodology. Since (...) a number of his strategies appeal to linguistic evidence, it will be of great interest to linguists as well. (shrink)

The value problem in epistemology is rooted in a commonsense intuition to the effect that knowledge is more valuable than true belief. Call this the “guiding intuition.” The guiding intuition generates a problem in light of two additional considerations. The first is that knowledge is (roughly) justified or warranted true belief.[1] The second is that on certain popular accounts of justification or warrant (e.g. reliabilism), its value is apparently instrumental to and hence derivative from the value of true belief.[2] But (...) if knowledge is justified true belief and the value of justification is derivative from that of true belief, how is it that knowledge is more valuable than true belief? (shrink)

With its focus on intellectual virtues and their role in the acquisition and transmission of knowledge and related epistemic goods, virtue epistemology provides a rich set of tools for educational theory and practice. In particular, characteristics under the rubric of "responsibilist" virtue epistemology, like curiosity, open-mindedness, attentiveness, intellectual courage, and intellectual tenacity, can help educators and students define and attain certain worthy but nebulous educational goals like a love of learning, lifelong learning, and critical thinking. This volume is devoted to (...) exploring the intersection between virtue epistemology and education. It assembles leading virtue epistemologists and philosophers of education to address such questions as: Which virtues are most essential to education? How exactly should these virtues be understood? How is the goal of intellectual character growth related to other educational goals, for example, to critical thinking and knowledge-acquisition? What are the "best practices" for achieving this goal? Can growth in intellectual virtues be measured? The chapters are a prime example of "applied epistemology" and promise to be a seminal contribution to an area of research that is rapidly gaining attention within epistemology and beyond. (shrink)

In the Theological-Political Treatise, published in 1670, Spinoza asked why people “fight for their servitude as if for salvation.” In doing so, he foregrounded the affective dimension of despotism, putting forward the idea that servitude is not just passively endured but passionately strived for—something people want and will. Three hundred years later, Gilles Deleuze and Félix Guattari repeated this formula in Anti-Oedipus, arguing that it was the central question of political philosophy. They read Spinoza through Wilhelm Reich, stating that the (...) astonishing thing is that “those who are exploited are not continually out on strike.” In doing so they shifted the political question from domination to exploitation. Following Deleuze and Guattari, I argue for an updated version of the question, asking why people fight for exploitation as if it were rebellion. Asking this question involves reexamining the way in which the critique of religion is the antechamber of the critique of political economy in Marx, and is the thread connecting Spinoza to Marx. Finally, I argue that reframing the question in terms of rebellion and exploitation is useful in making sense of contemporary forms of right populism that present themselves as rebellion, but actually deepen the domination of capitalism over our lives. (shrink)

This article examines two questions about scientists’ search for knowledge. First, which search strategies generate discoveries effectively? Second, is it advantageous to diversify search strategies? We argue pace Weisberg and Muldoon, “Epistemic Landscapes and the Division of Cognitive Labor”, that, on the first question, a search strategy that deliberately seeks novel research approaches need not be optimal. On the second question, we argue they have not shown epistemic reasons exist for the division of cognitive labor, identifying the errors that led (...) to their conclusions. Furthermore, we generalize the epistemic landscape model, showing that one should be skeptical about the benefits of social learning in epistemically complex environments. (shrink)

__Deep in Thought_ provides an introduction to intellectual virtues—the personal qualities and character strengths of good thinkers and learners—and outlines a pragmatic approach for teachers to reinforce them in the classroom._ With a combination of theoretical expertise and practical experience, philosopher Jason Baehr endorses intellectual virtues as a rich, meaningful way to think about and understand the purpose of education. He makes a persuasive case for prioritizing intellectual virtues in the classroom to facilitate deeper learning, encourage lifelong learning, and (...) enrich teacher practice. Baehr profiles nine key virtues that enable learners to initiate the process of learning, maintain forward momentum, and overcome common obstacles. With engaging anecdotes and concrete examples, he presents a wealth of principles, postures, and practices that educators can employ in promoting essential habits of mind such as curiosity, open-mindedness, and intellectual courage. Baehr illustrates how opportunities to practice these intellectual habits can be integrated into the classroom in ways that align with current teaching practices. In addition, he shows how educators can adapt these practices to accommodate students’ identities, developmental abilities, and interests. This thought-provoking book supports all educators, especially middle and high school teachers, in teaching for intellectual virtues. _Deep in Thought_ is a philosophical and yet practical guide to one of the most important aims of education: helping students become skilled thinkers and learners. (shrink)

This volume is the first in English to provide a full, systematic investigation into Aristotle's criticisms of earlier Greek theories of the soul from the perspective of his theory of scientific explanation. Some interpreters of the De Anima have seen Aristotle's criticisms of Presocratic, Platonic, and other views about the soul as unfair or dialectical, but Jason W. Carter argues that Aristotle's criticisms are in fact a justified attempt to test the adequacy of earlier theories in terms of the (...) theory of scientific knowledge he advances in the Posterior Analytics. Carter proposes a new interpretation of Aristotle's confrontations with earlier psychology, showing how his reception of other Greek philosophers shaped his own hylomorphic psychology and led him to adopt a novel dualist theory of the soul–body relation. His book will be important for students and scholars of Aristotle, ancient Greek psychology, and the history of the mind–body problem. (shrink)

After a brief overview of what intellectual virtues are, I offer three arguments for the claim that education should aim at fostering ‘intellectual character virtues’ like curiosity, open-mindedness, intellectual courage, and intellectual honesty. I then go on to discuss several pedagogical and related strategies for achieving this aim.

This commentary validates the fundamental evolutionary interconnection between the emergence of imitation and the mirror system. We present a novel computational framework for studying the evolutionary origins of imitative behavior and examining the emerging underlying mechanisms. Evolutionary adaptive agents that evolved in this framework demonstrate the emergence of neural “mirror” mechanisms analogous to those found in biological systems.

In this paper, I respond to recent attempts by philosophers to deny the existence of something that is both real and significant: reasonable disagreements between epistemic peers. In their arguments against the possibility of such disagreements, skeptical philosophers typically invoke one or more of the following: indifference reasoning , equal weight principles , and uniqueness theses . I take up each of these in turn, finding ample reason to resist them. The arguments for indifference reasoning and equal weight principles tend (...) to overlook the possibility of a certain kind of agnostic credal state which I call deep agnosticism , the possibility of which derails the arguments. The arguments for uniqueness theses tend to invoke a flawed understanding of the evidential support relation. When these problems and misunderstandings are brought into the light and corrected, the threat to reasonable disagreement vanishes. (shrink)

In De interpretatione 9, Aristotle argues against the fatalist view that if statements about future contingent singular events (e.g. ‘There will be a sea battle tomorrow,’ ‘There will not be a sea battle tomorrow’) are already true or false, then the events to which those statements refer will necessarily occur or necessarily not occur. Scholars have generally held that, to refute this argument, Aristotle allows that future contingent statements are exempt from either the principle of bivalence, or the law of (...) excluded middle. This paper offers a new interpretation of Aristotle’s refutation of fatalism. According to this interpretation, each member of a pair of contradictory future contingent statements, in virtue of expressing modal necessity, is simply false. (shrink)

In this provocative book, Jason Brennan challenges our fundamental assumptions about voting, revealing why it is not a duty for most citizens--in fact, he ...

May you sell your vote? May you sell your kidney? May gay men pay surrogates to bear them children? May spouses pay each other to watch the kids, do the dishes, or have sex? Should we allow the rich to genetically engineer gifted, beautiful children? Should we allow betting markets on terrorist attacks and natural disasters? Most people shudder at the thought. To put some goods and services for sale offends human dignity. If everything is commodified , then nothing is (...) sacred. The market corrodes our character. Or so most people say. In Markets without Limits , Jason Brennan and Peter Jaworski give markets a fair hearing. The market does not introduce wrongness where there was not any previously. Thus, the authors claim, the question of what rightfully may be bought and sold has a simple answer: if you may do it for free, you may do it for money. Contrary to the conservative consensus, they claim there are no inherent limits to what can be bought and sold, but only restrictions on how we buy and sell. (shrink)

There is a basic methodological difference in the way anarchists and non-anarchists think about politics, often more implicit than explicit. Anarchists see politics and justice as being concerns of social institutions, norms, and relations generally – both inside and outside the state. Much of academic political philosophy talks of politics and justice as if they are definitionally concerns about what states should do, or our relationships with each other through the state. In this chapter, we argue that the anarchists are (...) on the right side of this difference. We call the insight that undergirds the anarchists’ understanding of politics and justice “methodological anarchism.” We seek to exorcise the policy framework in favor of methodological anarchism. Indeed, we believe it should be embraced by all political philosophers, not only the anarchists among their ranks. Political philosophers ought to abstain from the policy framework for two reasons. Firstly, it is analytically impoverished inasmuch as, when followed to its logical conclusion, it is unable to engage with enormous areas of analysis that are relevant to what makes a society just or unjust. Secondly, it instills subtle prejudice against other important approaches to mitigating injustice that are unconcerned with public policy. This also carries the danger of lending ideological support for existing injustices and thereby entrenching them. Accepting our critique of the policy framework and adopting methodological anarchism does not necessarily require the acceptance of any kind of substantive political anarchism. But it does mean thinking a bit more like an anarchist about how to make society more just – thus our characterization of it as “methodological.”. (shrink)

Virtue Epistemology Virtue epistemology is a collection of recent approaches to epistemology that give epistemic or intellectual virtue concepts an important and fundamental role. Virtue epistemologists can be divided into two groups, each accepting a different conception of what an intellectual virtue is. Virtue reliabilists conceive of intellectual virtues as stable, reliable and truth-conducive cognitive … Continue reading Virtue Epistemology →.

Incompatibilists believe free will is impossible if determinism is true, and they often claim that this view is supported by ordinary intuitions. We challenge the claim that incompatibilism is intuitive to most laypersons and discuss the significance of this challenge to the free will debate. After explaining why incompatibilists should want their view to accord with pretheoretical intuitions, we suggest that determining whether incompatibilism is in fact intuitive calls for empirical testing. We then present the results of our studies, which (...) put significant pressure on the claim that incompatibilism is intuitive. Finally, we consider and respond to several potential objections to our approach. (shrink)

Induced by intake of the psychedelic substances LSD, psilocybin, DMT and mescaline, psychedelic experiences have been extensively described by subjects as entailing a most unusual increase in the scope and quality of their consciousness. Accordingly, psychedelic experiences have been widely characterised as an “expansion of consciousness.” This article poses the following question, as yet unaddressed in contemporary philosophy and the tradition of phenomenology: to what exactly does “expansion of consciousness” refer as a general characterisation of psychedelic experiences, and what role (...) might attention play therein? On the basis of Aron Gurwitsch’s phenomenology of attention, the following thesis is presented: (a) “expansion of consciousness” refers to a particular restructuration of consciousness in psychedelic experiences. (b) This occurs by means of certain extreme transformations in direction, scope, mode and degree of attention. In order to explicate this thesis, the characteristic features of psychedelic experiences that pertain to expansion of consciousness and attention are first systematically identified from a survey of subject reports. Second, it is demonstrated that the few previous attempts to understand expansion of consciousness in terms of attention as a filter/reducing-valve, spotlight or zoom-lens each fail to explain how consciousness is structured in psychedelic experiences. Third, it is argued that psychedelic expansion of consciousness is a general restructuration of consciousness by means of extreme attentional transformations. In conclusion, brief consideration is given to the question of whether psychedelic expansion of consciousness can have epistemic and ethical value for life. (shrink)

A consensus exists among contemporary philosophers of biology about the history of their field. According to the received view, mainstream philosophy of science in the 1930s, 40s, and 50s focused on physics and general epistemology, neglecting analyses of the 'special sciences', including biology. The subdiscipline of philosophy of biology emerged (and could only have emerged) after the decline of logical positivism in the 1960s and 70s. In this article, I present bibliometric data from four major philosophy of science journals (Erkenntnis, (...) Philosophy of Science, Synthese, and the British Journal for the Philosophy of Science), covering 1930-59, which challenge this view. (shrink)

This chapter considers an epistemological argument from disagreement which concludes that many of most people’s moral beliefs do not amount to knowledge. Various ways of understanding the argument are considered and it is argued that each relies on an epistemic principle that is under-motivated, overgeneralizes, and is indeed self-incriminating. These problems, it is suggested, infect many conciliationist theses in the epistemology of disagreement. Knowledge, it is argued, can withstand not only acknowledged peer disagreement, but also disagreement with the acknowledged experts. (...) If this is right, then the sort of epistemic principle that is required to move from moral disagreement to the conclusion that many of most people’s moral beliefs do not amount to knowledge has landed well off the mark. (shrink)

This chapter seeks clarification into how Marion understands “desire,” especially in The Erotic Phenomenon. Philosophies of “objectivity” have lost sight of love and its uniquely supporting evidences, and desire plays a number of roles in restoring to love the “dignity of a concept,” in its contribution to forming selfhood and “individualization,” and in its establishing the paradoxical bases of the erotic reduction and “eroticization.” Since he claims in La Rigueur des Choses that “The Erotic Phenomenon logically completes the phenomenology of (...) the gift and the saturated phenomenon,” it is necessary to conceive of how and to what degree. The erotic reduction demands that one bracket oneself and return to the Ursprung of intuition by asking the important question “can I be the first to love?” This chapter initiates an application of these findings on the manifold of desire back onto Marion’s understanding of “the gift” and his phenomenology of givenness. How might the erotic reduction and the reduction to givenness interrelate? Might love and desire be modes or “capacities” of alteration of one’s experience within intuition? Desire, which is conceived in relation to “lack” as a resource, provides a kind of “negative assurance” that allows the adonné to access an affirmation of love. (shrink)

Ontological Pluralism is the view that there are different modes, ways, or kinds of being. In this paper, I characterize the view more fully (drawing on some recent work by Kris McDaniel) and then defend the view against a number of arguments. (All of the arguments I can think of against it, anyway.).