This article considers the issue of opacity as a problem for socially consequential mechanisms of classification and ranking, such as spam filters, credit card fraud detection, search engines, news trends, market segmentation and advertising, insurance or loan qualification, and credit scoring. These mechanisms of classification all frequently rely on computational algorithms, and in many cases on machine learning algorithms to do this work. In this article, I draw a distinction between three forms of opacity: opacity as intentional corporate or state (...) secrecy, opacity as technical illiteracy, and an opacity that arises from the characteristics of machine learning algorithms and the scale required to apply them usefully. The analysis in this article gets inside the algorithms themselves. I cite existing literatures in computer science, known industry practices, and do some testing and manipulation of code as a form of lightweight code audit. I argue that recognizing the distinct forms of opacity that may be coming into play in a given application is a key to determining which of a variety of technical and non-technical solutions could help to prevent harm. (shrink)

ABSTRACTEmotional distractors can impair perception of subsequently presented targets, a phenomenon called emotion-induced blindness. Do emotional distractors lose their power to disrupt perception when appearing with increased frequency, perhaps due to desensitisation or enhanced recruitment of proactive control? Non-emotional tasks, such as the Stroop, have revealed that high frequency distractors or conflict lead to reduced interference, and distractor frequency appears to modulate attentional capture by emotional distractors in spatial attention tasks. But emotion-induced blindness is thought to reflect perceptual competition between (...) targets and emotional distractors, and it is unclear whether high frequency emotional stimuli cause less disruption at this relatively early stage of processing. In four experiments, participants searched streams of images for a rotated target image. A negative or neutral distractor appeared before the target, and their relative frequency was manipulated. Across all exper... (shrink)

This article illustrates how racial capitalism can enhance understandings of data, capital, and inequality through an in-depth study of digital platforms used for intervening in gender-based violence. Specifically, we examine an emergent sociotechnical strategy that uses software platforms and artificial intelligence chatbots to offer users emergency assistance, education, and a means to report and build evidence against perpetrators. Our analysis details how two reporting apps construct data to support institutionally legible narratives of violence, highlighting overlooked racialised dimensions of the data (...) capital generated through their use. We draw attention to how they reinforce property relations built on extraction and ownership, capital accumulation that reinforces benefits derived through data property relations and ownership, and the commodification of diversity and inclusion. Recognising these patterns are not unique to anti-violence apps, we reflect on how this example aids in understanding how racial capitalism becomes a constitutive element of digital platforms, which more generally extract information from users, rely on complex financial partnerships, and often sustain problematic relationships with the criminal legal system. We conclude with a discussion of how racial capitalism can advance scholarship at the intersections of data and power. (shrink)

This article analyses the ‘live’ virtual human in ABBA Voyage, the long-awaited concert reunion of the Swedish pop group ABBA, via Vilém Flusser’s concept of the digital apparition. It first argues for these virtual performers (dubbed ‘ABBA-tars’) to be understood as externalized computational codes which shift the grounds of ownership over and consent to the use of one’s likeness. They are also key to disproportionate and as yet unaccountable power held by technology companies. Secondly, ABBA Voyage’s presentation of ABBA as (...) their past selves places time in a capitalism of immateriality profiting from the protean temporality of bodies. This temporal discombobulation thwarts finitude and confounds time in meanings of life, death and growth. The article thus addresses urgent confrontations between actual and virtual humans placed in the same physical environment, and paves the way for thinking about how we are going to deal and live with their virtuality. (shrink)

This paper applies basic concepts of Logic-Based Therapy (LBT) to the case of a person in recovery from drug and alcohol addiction after relapse. The paper has been written in partial fulfillment of the requirements for the online Practical Reasoning course taught by Dr. Elliot D. Cohen at Indian River State College.

During the early twentieth century, the Bermuda Biological Station for Research functioned as a multipurpose scientific site. Jointly founded by New York University, Harvard University, and the Bermuda Natural History Society, the BBSR created opportunities for a mostly US-based set of practitioners to study animal biology in the field. I argue that mixed gender field stations like the BBSR supported professional advancement in science, while also operating as important places for women and men to experiment with the social and cultural (...) work of identity formation, courtship and marriage, and social critique. Between 1903 and 1930, the BBSR functioned as a laboratory of domesticity, a temporary scientific household in British Bermuda where women and men interacted with established colonial ideologies about science, sex difference, and racial hierarchy in their public and private accounts of doing biology and socializing in the field. Viewing field stations as generative of multiple forms of labor offers a corrective to narratives within the history of biology, in which scientific practices are considered to be the principal forms of output produced by practitioners in the field. Understanding how women and men at the BBSR engaged with the politics of gender and race from the periphery of U.S. networks of biology suggests that we might view field stations as shaping not only academic science but also domestic life and fields as disparate as fiction and the law. (shrink)

Artificial Intelligence (AI), especially of the machine learning (ML) variety, is used by health care organizations to assist with a number of tasks, including diagnosing patients and optimizing operational workflows. AI products already proliferate the health care market, with usage increasing as the technology matures. Although AI may potentially revolutionize health care, the use of AI in health settings also leads to risks ranging from violating patient privacy to implementing a biased algorithm. This chapter begins with a broad overview of (...) health care AI and how it is currently used. We then adopt a “lifecycle” approach to discussing issues with health care AI. We start by discussing the legal and ethical issues pertaining to how data to build AI are gathered in health care settings, focusing on privacy. Next, we turn to issues in algorithm development, especially algorithmic bias. We then discuss AI deployment to treat patients, focusing on informed consent. Finally, we will discuss existing oversight mechanisms for health AI in the United States: liability and regulation. (shrink)

In this book, Phillip Wiebe examines religious, spiritual, and mystical experiences, assessing how these experiences appear to implicate a spiritual order. Despite the current prevalence of naturalism and atheism, he argues that experiences purporting to have a religious or spiritual significance deserve close empirical investigation. Wiebe surveys the broad scope of religious experience and considers different types of evidence that might give rise to a belief in phenomena such as spirits, paranormal events, God, and an afterlife. He demonstrates that there (...) are different explanations and interpretations of religious experiences, both because they are typically personal accounts, and they suggest a reality that is often unobservable. Wiebe also addresses how to evaluate evidence for theories that postulate unobservables in general, and a Theory of Spirits in particular. Calling for more rigorous investigation of these phenomena, Wiebe frames the study of religious experience among other accepted social sciences that seek to understand religion. (shrink)

In the past 50 years, ethical concerns concerning human experimentation have arisen with the advancement of new medical research and technology. While the benefits of human experimentation are well known in the fields of biology, psychology, sociology, and medicine, the conditions of human subject research have been persistently controversial. This book discusses ethical perspectives, emerging developments and global challenged of patient rights. Topics include effective medical informed consent; rights to health and dental care; the ethics of HIV screening targeted to (...) the seriously mentally ill; and problems in ethics for medical publication. (shrink)

The article addresses the contributions psychoanalytic theory, particularly its concepts of transference and counter-transference, can make to our understanding of reflexivity in intercultural education (IE). After the introduction, the article is organized into three parts. The first part is a psychoanalytic discussion that focuses on the concepts of transference and counter-transference. The second part elaborates on the concepts of transference and counter-transference by presenting examples through existing studies in the fields of multicultural and IE and psychoanalysis to illuminate what it (...) would mean to psychoanalytically understand aspects of intercultural relations and reflexivity. In the third section, while contending that this article does not exclude other forms of reflexivity or delimit the danger of uncritically accepting the potentials for reflexivity, it offers the implications drawn from the discussions in the first and second sections by concluding that psychoanalysis is an area of inquiry that forces us to question how unconscious forces affect our interaction with students, the curriculum, and the meaning we give to teaching and learning experiences. The article concludes that reflexivity in IE can benefit from considering the effects of transference and counter-transference. (shrink)

Nonsense‐mediated RNA decay (NMD) represents an established quality control checkpoint for gene expression that protects cells from consequences of gene mutations and errors during RNA biogenesis that lead to premature termination during translation. Characterization of NMD‐sensitive transcriptomes has revealed, however, that NMD targets not only aberrant transcripts but also a broad array of mRNA isoforms expressed from many endogenous genes. NMD is thus emerging as a master regulator that drives both fine and coarse adjustments in steady‐state RNA levels in the (...) cell. Importantly, while NMD activity is subject to autoregulation as a means to maintain homeostasis, modulation of the pathway by external cues provides a means to reprogram gene expression and drive important biological processes. Finally, the unanticipated observation that transcripts predicted to lack protein‐coding capacity are also sensitive to this translation‐dependent surveillance mechanism implicates NMD in regulating RNA function in new and diverse ways. (shrink)

BackgroundThe past 10 years have witnessed a significant growth in sharing of health data for secondary uses. Alongside this there has been growing interest in the public acceptability of data sharing and data linkage practices. Public acceptance is recognised as crucial for ensuring the legitimacy of current practices and systems of governance. Given the growing international interest in this area this systematic review and thematic synthesis represents a timely review of current evidence. It highlights the key factors influencing public responses (...) as well as important areas for further research.MethodsThis paper reports a systematic review and thematic synthesis of qualitative studies examining public attitudes towards the sharing or linkage of health data for research purposes. Twenty-five studies were included in the review. The included studies were conducted primarily in the UK and North America, with one study set in Japan, another in Sweden and one in multiple countries. The included studies were conducted between 1999 and 2013. The qualitative methods represented in the studies included focus groups, interviews, deliberative events, dialogue workshops and asynchronous online interviews.ResultsKey themes identified across the corpus of studies related to the conditions necessary for public support/acceptability, areas of public concern and implications for future research. The results identify a growing body of evidence pointing towards widespread general—though conditional—support for data linkage and data sharing for research purposes. Whilst a variety of concerns were raised in cases where participants perceived there to be actual or potential public benefits from research and had trust in the individuals or organisations conducting and/or overseeing data linkage/sharing, they were generally supportive. The studies also find current low levels of awareness about existing practices and uses of data.ConclusionsWhilst the results indicate widespread public support for data sharing and linkage for research purposes, a range of concerns exist. In order to ensure public support for future research uses of data greater awareness raising combined with opportunities for public engagement and deliberation are needed. This will be essential for ensuring the legitimacy of future health informatics research and avoiding further public controversy. (shrink)

With the introduction of new information communication technologies, employers are increasingly engaging in social media screening, also known as cybervetting, as part of their hiring process. Our research, using an online survey with 482 participants, investigates young people’s concerns with their publicly available social media data being used in the context of job hiring. Grounded in stakeholder theory, we analyze the relationship between young people’s concerns with social media screening and their gender, job seeking status, privacy concerns, and social media (...) use. We find that young people are generally not comfortable with social media screening. A key finding of this research is that concern for privacy for public information on social media cannot be fully explained by some “traditional” variables in privacy research. The research extends stakeholder theory to identify how social media data ethics should be inextricably linked to organizational practices. The findings have theoretical implications for a rich conceptualization of stakeholders in an age of social media and practical implications for organizations engaging in cybervetting. (shrink)

In this paper, I reconstruct Hobbes’ theory of self-love. I then examine Hume’s arguements that (i) self-love does not properly account for moral behavior and (ii) self-love is unnecessary for moral theory. I argue that Hobbesian self-love can account for both of Hume’s objections. Further, I use an analysis of Hobbes’ Deliberation to show, contra Hume, that self-love does not entail a lack of intention in moral action.

Sexual harassment is often understood as a subjective notion that asks the woman if she has been victimized. This paper argues that we need not ask women if they are victims by conceptualizing sexual harassment as an objective notion that holds the perpetrator accountable for his actions. In making my case, I will apply an objective conception of sexual harassment to the U.S. Supreme Court case Meritor Savings Bank v. Vinson by drawing on the feminist view of sexual harassment given (...) by Anita Superson and the role of equality and autonomy as motivated by Ronald Dworkin and James Griffin, respectively. (shrink)

Music training is associated with enhanced executive function but little is known about the extent to which harmonic aspects of musical training are associated with components of executive function. In the current study, an array of cognitive tests associated with one or more components of executive function, was administered to young adult musicians and non-musicians. To investigate how harmonic aspects of musical training relate to executive function, a test of the ability to compose a four-part harmony was developed and administered (...) to musicians. We tested the working hypothesis that musicians would outperform non-musicians on measures of executive function, and that among musicians, the ability to harmonize would correlate positively with measures of executive function. Results indicate that musicians outperformed non-musicians on the Tower of London task, a measure of planning and problem-solving. Group differences were not detected on tasks more selective for inhibitory control, conflict resolution, or working memory. Among musicians, scores on the harmony assessment were positively correlated with performance of the Tower of London task. Taken together, the current results support a strong relationship between musicianship and planning and problem solving abilities, and indicate that the ability to harmonize is associated with components of executive function contributing to planning and problem solving. (shrink)

Business ethics is a topic receiving much attention in the literature. However, the term 'business ethics' is not adequately defined. Typical definitions refer to the rightness or wrongness of behavior, but not everyone agrees on what is morally right or wrong, good or bad, ethical or unethical. To complicate the problem, nearly all available definitions exist at highly abstract levels. This article focuses on contemporary definitions of business ethics by business writers and professionals and on possible areas of agreement among (...) the available definitions. Then a definition is synthesized that is broad enough to cover the field of management in a sense as full as most managers might conceive of it. (shrink)

This study empirically investigates the dismissal of U.S. CEOs following negative media coverage of environmental, social, and governance (ESG) practices. Extending related literature on the media, ESG, and CEO dismissal, I develop a theoretical framework that considers the media as an influential third party that forms and reflects public opinion about ESG issues. In this role, the media reduces information asymmetry by providing cues on their relative salience and prompting corporate directors to attribute firm-level ESG issues to the CEO, regardless (...) of their involvement in the misconduct. Findings confirm this framework and particularly suggest that coverage of issues in prominent media sources is more likely to result in CEO dismissal. Further, companies that have made public commitments to ESG oversight and those with stronger monitoring are more likely to dismiss the CEO following negative coverage of ESG issues. Overall, this study builds an understanding of how contemporary boards approach the uncertain CEO dismissal decision amidst media coverage of ESG- related misconduct and reflects a shifting norm towards ESG integration at the board-level. (shrink)

In this moment of rising nationalism worldwide, governments, civil society groups, transnational companies, and web users all complain of increasing regional fragmentation online. While prior work in this area has primarily focused on issues of government censorship and regulatory compliance, we use an inductive and qualitative approach to examine targeted blocking by corporate entities of entire regions motivated by concerns about fraud, abuse, and theft. Through participant-observation at relevant events and intensive interviews with experts, we document the quest by professionals (...) tasked with preserving online security to use new machine-learning based techniques to develop a “fairer” system to determine patterns of “good” and “bad” usage. However, we argue that without understanding the systematic social and political conditions that produce differential behaviors online, these systems may continue to embed unequal treatments, and troublingly may further disguise such discrimination behind more complex and less transparent automated assessment. In order to support this claim, we analyze how current forms of regional blocking incentivize users in blocked regions to behave in ways that are commonly flagged as problematic by dominant security and identification systems. To realize truly global, non-Eurocentric cybersecurity techniques would mean incorporating the ecosystems of service utilization developed by marginalized users rather than reasserting norms of an imagined user that casts aberrations as suspect. (shrink)

This article is an analysis of rumors about Internet scamming told by Internet café users in the West African capital city of Accra, Ghana. Rumors provided accounts of how the Internet can be effectively operated by young Ghanaians to realize ‘‘big gains’’ through foreign connections. Yet these accounts were contradicted by the less promising direct experiences users had at the computer interface. Rumors amplified evidence of wildly successful as well as especially harmful encounters with the Internet. Rather than simply transferring (...) information, through the telling of rumors, Internet users reclaimed a social stability that was disrupted by the presence of the Internet. These stories cast young Ghanaian Internet users as both good and effective in relation to the Internet. The study of accounts as they relate to the activities accounted for is an established area of interest in social theory. By considering how rumors function as accounts and how such interpretations of the technology are propagated among users, this analysis contributes to a broader understanding of user agency. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Reviewed by:WisCon 46Laurie Fuller, Jenna N. Hanchey, and E. OrnelasExistence as Resistance, WisCon 46, May 26–29, 2023, Madison, Wisconsin, United StatesIn a world that seems structured to kill most of its occupants, there is a utopian impulse in the act of existence itself. WisCon 46 represented a prefigurative utopian impulse through centering continued marginalized existence as resistance.1 Leah Lakshmi Piepzna-Samarasinha calls “prefigurative politics” the “fancy term for the (...) idea of imagining and building the world we want to see now,” particularly in terms of access needs.2 The structure as well as the content of the convention itself created a space in which to set the groundwork for utopia: the ways that we live and act to resist structures of oppression in order to prefigure a better world.Since WisCon’s founding in 1977, its intended audience has been fans, authors, and academics interested in the intersection between feminism and “science fiction, fantasy, and speculative literature of all sorts.”3 While neither feminism nor speculative fiction could be solely defined as utopian, both do explore utopian impulses that inspire change for the better. Therein lies the hope of Alessa Johns’s proposal that “the utopian imagination has been crucial for feminists.”4 Lisa Yaszek agrees: “for nearly 200 years writers have used speculative fiction consciously and collectively to dramatize the political issues most central to women living in a technocultural world and to create a sense of wonder about the interrelated possibilities of social and scientific change.”5 Envisioning a liberatory world is a feminist imperative, and speculative fiction offers a unique venue to do so. This imperative informed WisCon this year, as participants collectively worked to imagine and enact a better future for marginalized folks, in and beyond the space of the conference. [End Page 618]Enabling Existence through Con StructuresWisCon is unique in attuning its organizational structure to the creation of liberatory futures in the here and now. WisCon is strongly attentive to disability access of all kinds, COVID safety, antiracist/anti-oppression principles, and safety and anti-abuse support for all these areas. In the contemporary US context—where COVID-19 remains a major barrier to disabled people wishing to participate in conventions, where racist violence continues to threaten BIPOC (Black, Indigenous, and People of Color) life, where queer and trans folks are under exacerbated legal attacks—creating a convention space that protects and enables marginalized participation becomes a means of prefiguring utopian potential through embodied praxis. As mask, capacity, and vaccination mandates disappear (despite these ongoing pandemic times), and as bigotry of all forms continues relatively unabated, WisCon 46 remains steadfast in its commitment to safety. In short, the conference itself aims to become a utopian space.WisCon organizers are also keenly aware of the challenges that many different bodyminds might encounter in large group settings.6 Trained monitors oversee in-person and online programming in an effort to discourage harmful words and actions as well as ensure the fullest participation for those most impacted. Hence, disability justice lies at the center of the Con’s policies and practices. The event is made as accessible as possible through careful attention to venue selection, including the availability of gender-neutral bathrooms, scent-free spaces, and quiet rooms, as well as the use of color communication badges.This year’s event followed strict masking and testing protocols: individually packaged rapid COVID-19 tests were available without cost at registration, as were KN95 masks. The Con kept an anonymized record of self-reported positive COVID-19 tests, in case of possible exposure. This mutual responsibility reflects the kind of utopianism inherent to disability politics; that is, disability “allows for reformulation of in/dependence and community,” a way of rethinking how we share space and produce knowledge together.7The conference’s decidedly feminist approach “to creating a space for feminism and its consideration within the science fiction community” is applied at every level. The Con’s general organization and procedures are structured as nonhierarchically as possible. There is a board of directors as well as co-chairs, but these are rotating positions. This “commitment to feminism” is [End Page 619] reflected... (shrink)

This paper will explore the 1948 Universal Declaration of Human Rights as an exemplar of political mythmaking, a genre of narrative designed to channel and thereby to quell social anxiety and to orient select groups toward desirable beliefs and practices. One of the Declaration’s most fundamental and forceful elements is its enshrinement of the “inherent dignity” of each member of the human family. Drawing upon contemporary theorizations of mythmaking and sacralization, this article will elucidate the manner in which inherent dignity (...) functions as the central item of sacredness within what we might call the “secular morality” of universal human rights. (shrink)

The last decades of research have consistently found strong associations between divorce and adverse health outcomes among adults. However, limitations of a majority of this research include lack of “real-time” research, i.e., research employing data collected very shortly after juridical divorce where little or no separation periods have been effectuated, research employing thoroughly validated and population-normed measures against which study results can be compared, and research including a comprehensive array of previously researched sociodemographic- and divorce-related variables. The current cross-sectional study, (...) including 1,856 recently divorced Danes, was designed to bridge these important gaps in the literature. Mental and physical health were measured using the Short Form 36 -2. Analyses included correlational analyses, t-test comparisons, and hierarchical multiple regression analyses. The study found that the health-related quality of life of Danish divorcees was significantly worse than the comparative background population immediately following divorce. Across gender, higher levels of divorce conflict were found to predict worse mental health, and worse physical health for women, even when controlling for other socio-demographic variables and divorce characteristics. Among men, lower age and higher income predicted better physical health, while more children, more previous divorces, participant divorce initiation, new partner status, and lower levels of divorce conflict predicted better mental health. Among women, higher income, fewer previous divorces, new partner status, and lower levels of divorce conflict predicted better physical health while higher income, participant divorce initiation, new partner status, and lower levels of divorce conflict predicted better mental health. The findings underscore the relevance of providing assistance to divorcees who experience higher levels of divorce conflict immediately following divorce, in seeking to reduce potential long-term negative health effects of divorce. (shrink)

The mass movement of people across the globe constitutes a major feature of world politics today. -/- Whatever the cause of the movement - often war, famine, economic hardship, political repression or climate change - the governments of western capitalist states see this 'torrent of people in flight' as a serious threat to their stability and the scale of this migration indicates a need for a radical re-thinking of both political theory and practice, for the sake of political, social and (...) economic justice. -/- This book argues that there is at present a serious gap between the legal and social practices of immigration and naturalisation in liberal democratic states and any theoretical justification for such practices that can be made within the tradition of liberal political philosophy. How can liberal states develop institutions of democratic citizenship and at the same time justifiably exclude 'outsiders' from participating in those institutions? The book examines various responses to this contradiction within the liberal tradition, and finds none of them satisfactory - there are no consistently liberal justifications for immigration control and this has serious implications both for liberal practice and theory. (shrink)

To properly understand behavior, we must obtain both ultimate and proximate explanations. Put briefly, ultimate explanations are concerned with why a behavior exists, and proximate explanations are concerned with how it works. These two types of explanation are complementary and the distinction is critical to evolutionary explanation. We are concerned that they have become conflated in some areas of the evolutionary literature on human behavior. This article brings attention to these issues. We focus on three specific areas: the evolution of (...) cooperation, transmitted culture, and epigenetics. We do this to avoid confusion and wasted effort—dangers that are particularly acute in interdisciplinary research. Throughout this article, we suggest ways in which misunderstanding may be avoided in the future. (shrink)

Composition as identity, as I understand it, is a theory of the composite structure of reality. The theory’s underlying logic is irreducibly plural; its fundamental primitive is a generalized identity relation that takes either plural or singular arguments. Strong versions of the theory that incorporate a generalized version of the indiscernibility of identicals are incompatible with the framework of plural logic, and should be rejected. Weak versions of the theory that are based on the idea that composition is merely analogous (...) to identity are too weak to be interesting, lacking in metaphysical consequence. I defend a moderate version according to which composition is a kind of identity, and argue that the difference is metaphysically substantial, not merely terminological. I then consider whether the notion of generalized identity, though fundamental, can be elucidated in modal terms by reverse engineering Hume’s Dictum. Unfortunately, for realists about possible worlds, such as myself,... (shrink)

Niche construction refers to the activities of organisms that bring about changes in their environments, many of which are evolutionarily and ecologically consequential. Advocates of niche construction theory (NCT) believe that standard evolutionary theory fails to recognize the full importance of niche construction, and consequently propose a novel view of evolution, in which niche construction and its legacy over time (ecological inheritance) are described as evolutionary processes, equivalent in importance to natural selection. Here, we subject NCT to critical evaluation, in (...) the form of a collaboration between one prominent advocate of NCT, and a team of skeptics. We discuss whether niche construction is an evolutionary process, whether NCT obscures or clarifies how natural selection leads to organismal adaptation, and whether niche construction and natural selection are of equivalent explanatory importance. We also consider whether the literature that promotes NCT overstates the significance of niche construction, whether it is internally coherent, and whether it accurately portrays standard evolutionary theory. Our disagreements reflect a wider dispute within evolutionary theory over whether the neo-Darwinian synthesis is in need of reformulation, as well as different usages of some key terms (e.g., evolutionary process). (shrink)

: The transplantation of adult human neural stem cells into prenatal non-humans offers an avenue for studying human neural cell development without direct use of human embryos. However, such experiments raise significant ethical concerns about mixing human and nonhuman materials in ways that could result in the development of human-nonhuman chimeras. This paper examines four arguments against such research, the moral taboo, species integrity, "unnaturalness," and human dignity arguments, and finds the last plausible. It argues that the transfer of human (...) brain or retinal stem cells to nonhuman embryos would not result in the development of human-nonhuman chimeras that denigrate human dignity, provided such stem cells are dissociated. The article provides guidelines that set ethical boundaries for conducting such research that are consonant with the requirements of human dignity. (shrink)

It follows from Humean principles of plenitude, I argue, that island universes are possible: physical reality might have 'absolutely isolated' parts. This makes trouble for Lewis's modal realism; but the realist has a way out. First, accept absolute actuality, which is defensible, I argue, on independent grounds. Second, revise the standard analysis of modality: modal operators are 'plural', not 'individual', quantifiers over possible worlds. This solves the problem of island universes and confers three additional benefits: an 'unqualified' principle of compossibility (...) can be accepted; the possibility of nothing can be accommodated; and the identity of indiscernible worlds can be decisively refuted. (shrink)

This volume contains eighteen papers, three with new postscripts, that were written over the past 35 years. Five of the papers have not been previously published. Together they provide a comprehensive account of modal reality—the realm of possible worlds—from a Humean perspective, with excursions into neighboring topics in metaphysics. Part 1 sketches an account of reality as a whole, both the mathematical and the modal, defending a form of plenitudinous realism: every consistent proposition is true of some portion of reality. (...) Part 2 presents and defends a realist theory of concrete possible worlds with an absolute ontological distinction between the actual and the merely possible. Part 3 presents and defends a Humean account of modal plenitude, formulating and endorsing principles of recombination, of plenitude of possible structures, and of plenitude of alien contents. Part 4 applies the Humean account to truthmaking, mereology, spacetime, and quantities. I argue that holding fast to Humean strictures leads to views that differ in radical ways from those put forth by contemporary metaphysicians. (shrink)