This paper examines the claims in the debate on cognitive enhancement in neuroethics that society wide pressure to enhance can be expected in the near future. The author uses rational choice modeling to test these claims and proceeds with the analysis of proposed types of solutions. The discourage use, laissez-faire and prohibition types of policy are scrutinized for effectiveness, legitimacy and associated costs. Special attention is given to the moderately liberal discourage use policy (and the gate-keeper and taxation approaches within (...) this framework), as many authors presuppose that this type of policy would best serve public interest. Different more or less articulated models in the taxation approach (Tobacco regulation analogy, Coffee-shop system, Regulatory Authority for Cognitive Enhancements and Economic Disincentives Model) are analyzed from the point of view of justificatory liberalism. The author concludes that prohibition and laissez-faire types of policy would neither be effective nor justified. A moderately liberal public policy shows more promise, but not all approaches within this type of policy would be legitimate and effective. The “gate-keeper” approach and related models could not be justified whereas approach based on taxation with suitable models might be legitimate and effective. (shrink)
There is mounting evidence that non-invasive brain stimulation devices - transcranial direct current stimulation and transcranial magnetic stimulation could be used for cognitive enhancement. However, the regulatory environment surrounding such uses of stimulation devices is less clear than for stimulant drugs—a fact that has already been commercially exploited by several companies. In this paper, the mechanism of action, uses and adverse effects of non-invasive neurostimulation devices are reviewed, along with social and ethical challenges pertaining to their use as cognitive enhancements. (...) Two regulatory approaches that could be used to facilitate responsible use of these devices as products and services are outlined. Apart from establishing the urgently needed comprehensive regulatory framework, they might provide a starting point for establishing long term physiological and social effects of enhancement uses of tDCS and TMS. (shrink)
Recent research in empirical moral psychology attempts to understand the salient normative differences that laypeople have when making moral decisions by using survey methodology that is based on the operationalized principles from moral theories. The PPIMT is the first measure designed to assess respondents’ preference for the precepts implied in the three dominant moral theories: virtue ethics, deontology, and consequentialism. The current study used a latent modeling approach to determine the most theoretically and psychometrically-sound model for the PPIMT using a (...) combined sample of college students from a southeastern university in U.S. and MTurk respondents. The PPIMT model fit was acceptable with four items for Virtue, four items for Deontology, and three items for Consequentialism. (shrink)
Autonomous vehicles —and accidents they are involved in—attest to the urgent need to consider the ethics of artificial intelligence. The question dominating the discussion so far has been whether we want AVs to behave in a ‘selfish’ or utilitarian manner. Rather than considering modeling self-driving cars on a single moral system like utilitarianism, one possible way to approach programming for AI would be to reflect recent work in neuroethics. The agent–deed–consequence model :3–20, 2014a, Behav Brain Sci 37:487–488, 2014b) provides a (...) promising descriptive and normative account while also lending itself well to implementation in AI. The ADC model explains moral judgments by breaking them down into positive or negative intuitive evaluations of the agent, deed, and consequence in any given situation. These intuitive evaluations combine to produce a positive or negative judgment of moral acceptability. For example, the overall judgment of moral acceptability in a situation in which someone committed a deed that is judged as negative would be mitigated if the agent had good intentions and the action had a good consequence. This explains the considerable flexibility and stability of human moral judgment that has yet to be replicated in AI. This paper examines the advantages and disadvantages of implementing the ADC model and how the model could inform future work on ethics of AI in general. (shrink)
There is a growing literature in neuroethics dealing with the problem of cognitive neuroenhancement for healthy adults. However, discussions on this topic have tended to focus on abstract theoretical positions while concrete policy proposals and detailed models are scarce. Furthermore, discussions tend to rely solely on data from the US, while international perspectives are mostly neglected. Therefore, there is a need for a volume that deals with cognitive enhancement comprehensively in three important ways: a) with conceptual implications stemming from different (...) points of view; b) with ethical, social and legal perspectives that would not be limited to one part of the world but reflect on the current situation in countries in Africa, Asia, Australia, Europe, North America and South America; and c) with discussions of concrete law and policy options. Contributors for the conceptual implications section will elaborate an important general issue (e.g. ethical acceptability of direct-to-consumer-marketing in case of cognitive enhancement drugs). Contributors for international perspectives section will provide a clear discussion on normative issues and cultural values, along with an analysis of empirical data on public attitudes on cognitive enhancement and/or prevalence (specific to the country in question). Contributors for law and policy section will offer a justification for the general policy type they argue for (1. prohibition, 2. discourage use, 3. laissez-faire, 4. encourage use, and 5. mandatory use) in the case of specific cognitive enhancement measure. Furthermore, they would evaluate the possible impact of a detailed regulatory model on consumption and demand, fairness in competitive settings and the social pressure to enhance. (shrink)
Moral enhancement refers to the possibility of making individuals and societies better from a moral standpoint. A fierce debate has emerged about the ethical aspects of moral enhancement, notably because steering moral enhancement in a particular direction involves choosing amongst a wide array of competing options, and these options entail deciding which moral theory or attributes of the moral agent would benefit from enhancement. Furthermore, the ability and effectiveness of different neurotechnologies to enhance morality have not been carefully examined. In (...) this paper, we assess the practical feasibility of moral enhancement neurotechnologies. We reviewed the literature on neuroscience and cognitive science models of moral judgment and analyzed their implications for the specific target of intervention in moral enhancement. We also reviewed and compared evidence on available neurotechnologies that could serve as tools of moral enhancement. We conclude that the predictions of rationalist, emotivist, and dual process models are at odds with evidence, while different intuitionist models of moral judgment are more likely to be aligned with it. Furthermore, the project of moral enhancement is not feasible in the near future as it rests on the use of neurointerventions, which have no moral enhancement effects or, worse, negative effects. (shrink)
This article analyzes appropriate public policies for enhancement use of two most important stimulant drugs: Ritalin (methylphenidate) and Adderall (mixed amphetamine salts). The author argues that appropriate regulation of cognition enhancement drugs cannot be a result of a general discussion on cognitive enhancements as such, but has to be made on a case-by-case basis. Starting from the recently proposed taxation approach to cognition enhancement drugs, the author analyzes available, moderately permissive models of regulation. After a thorough analysis of relevant characteristics (...) of methylphenidate and amphetamine, the author concludes that a moderately liberal permissive regulation of enhancement use by healthy adults might be appropriate for extended release forms of methylphenidate. However, due to their danger profile, amphetamine and instant release forms of methylphenidate should not be made readily available to healthy adults and would need to be prohibited. (shrink)
What is the ethical impact of artificial intelligence assistants on human lives, and specifically how much do they threaten our individual autonomy? Recently, as part of forming an ethical framework for thinking about the impact of AI assistants on our lives, John Danaher claims that if the external automaticity generated by the use of AI assistants threatens our autonomy and is therefore ethically problematic, then the internal automaticity we already live with should be viewed in the same way. He takes (...) advantage of this paradox of internal automaticity to downplay the threats of external automaticity to our autonomy. We respond in this paper by challenging the legitimacy of the paradox. While Danaher assumes that internal and external automaticity are roughly equivalent, we argue that there are reasons why we should accept a large degree of internal automaticity, that it is actually essential to our sense of autonomy, and as such it is ethically good; however, the same does not go for external automaticity. Therefore, the similarity between the two is not as powerful as the paradox presumes. In conclusion, we make practical recommendations for how to better manage the integration of AI assistants into society. (shrink)
Neuroethics is an interdisciplinary field that arose in response to novel ethical challenges posed by advances in neuroscience. Historically, neuroethics has provided an opportunity to synergize different disciplines, notably proposing a two-way dialogue between an ‘ethics of neuroscience’ and a ‘neuroscience of ethics’. However, questions surface as to whether a ‘neuroscience of ethics’ is a useful and unified branch of research and whether it can actually inform or lead to theoretical insights and transferable practical knowledge to help resolve ethical questions. (...) In this article, we examine why the neuroscience of ethics is a promising area of research and summarize what we have learned so far regarding its most promising goals and contributions. We then review some of the key methodological challenges which may have hindered the use of results generated thus far by the neuroscience of ethics. Strategies are suggested to address these challenges and improve the quality of research and increase neuroscience's usefulness for applied ethics and society at large. Finally, we reflect on potential outcomes of a neuroscience of ethics and discuss the different strategies that could be used to support knowledge transfer to help different stakeholders integrate knowledge from the neuroscience of ethics. (shrink)
We investigated the acceptability and frequency of the use of cognitive enhancement (CE) drugs and three different types of academic misconduct (plagiarism, cheating in exams, and falsifying/fabricating data). Data from a web-based survey among German university students were used. Moral acceptability was relatively low for CE drug use and moderate for academic misconduct, while the correlation of their respective acceptability was moderately weak. Prevalence of CE drug use was lower than for academic misconduct and (very) lightly correlated with the prevalence (...) of plagiarism and fabrication/falsification. Acceptability of the investigated behaviors was associated with higher prevalence rates of each behavior. (shrink)
What is the ethical impact of artificial intelligence assistants on human lives, and specifically how much do they threaten our individual autonomy? Recently, as part of forming an ethical framework for thinking about the impact of AI assistants on our lives, John Danaher claims that if the external automaticity generated by the use of AI assistants threatens our autonomy and is therefore ethically problematic, then the internal automaticity we already live with should be viewed in the same way. He takes (...) advantage of this paradox of internal automaticity to downplay the threats of external automaticity to our autonomy. We respond in this paper by challenging the legitimacy of the paradox. While Danaher assumes that internal and external automaticity are roughly equivalent, we argue that there are reasons why we should accept a large degree of internal automaticity, that it is actually essential to our sense of autonomy, and as such it is ethically good; however, the same does not go for external automaticity. Therefore, the similarity between the two is not as powerful as the paradox presumes. In conclusion, we make practical recommendations for how to better manage the integration of AI assistants into society. (shrink)
Behavioural variant frontotemporal dementia is characterized by an absence of obvious cognitive impairment and presence of symptoms such as disinhibition, social inappropriateness, personality changes, hyper-sexuality, and hyper-orality. Affected individuals do not feel concerned enough about their actions to be deterred from violating social norms, and their antisocial behaviours are most likely caused by the neurodegenerative processes in the frontal and anterior temporal lobes. BvFTD patients present a challenge for the traditional notion of autonomy and the medical and criminal justice systems. (...) Antisocial behaviour is often the earliest recognized manifestation of bvFTD. Given that the symptoms are not specific and that atrophy of the frontal lobes is only observable with structural neuroimaging in the later stages of the disease, it is hard to ascertain their autonomy. Recently proposed re-conceptualizations of autonomy can, however, be sufficiently redefined to provide explicit rules and offer nuanced guidance in such cases. A combination of notions of autonomy gives the most nuanced guidance with three modifications: 1) including socio-moral judgement in the notion of “normal cognitive competence,” 2) excluding in-principle un-endorsable ideals from the notion of “capacity to value,” and 3) redefining ideal-typical degrees of compulsion. (shrink)
What is the ethical impact of artificial intelligence assistants on human lives, and specifically how much do they threaten our individual autonomy? Recently, as part of forming an ethical framework for thinking about the impact of AI assistants on our lives, John Danaher claims that if the external automaticity generated by the use of AI assistants threatens our autonomy and is therefore ethically problematic, then the internal automaticity we already live with should be viewed in the same way. He takes (...) advantage of this paradox of internal automaticity to downplay the threats of external automaticity to our autonomy. We respond in this paper by challenging the legitimacy of the paradox. While Danaher assumes that internal and external automaticity are roughly equivalent, we argue that there are reasons why we should accept a large degree of internal automaticity, that it is actually essential to our sense of autonomy, and as such it is ethically good; however, the same does not go for external automaticity. Therefore, the similarity between the two is not as powerful as the paradox presumes. In conclusion, we make practical recommendations for how to better manage the integration of AI assistants into society. (shrink)
In the article “Nudging and Informed Consent”, Cohen argues that the use of “nudging” by physicians in the clinical encounter may be ethically warranted because it results in an informed consent where obligations for beneficence and respect for autonomy are both met. However, the author's overenthusiastic support for nudging and his quick dismissal of shared decision-making leads him to assume that “soft” manipulation is un-problematic and that “wisdom” on the side of medical professionals will suffice to guard against abuse. Opposing (...) this view, we propose that: 1) patient preferences and values should not be boiled down to rational or irrational decisions based on cognitive reasoning alone, 2) potential threats to the physician-patient must be mitigated and could be minimized by employing alternative strategies that acknowledge the impact of cognitive heuristics in shaping decision-making but maintain transparency and trust, and 3) patient preferences and values can be legitimately influenced only under specific circumstances. The latter include: (1) exhaustion of other means; (2) evidence that nudging is effective in a specific context; (3) evidence of clear and active public misinformation (e.g., industry promoting smoking); (4) explicit pubic dialogue between various stakeholders including medical professional societies about nudging; (5) upholding shared decision-making as a preferred approach; and (6) a rich understanding of clinical reality beyond the simple dichotomy of beneficence-autonomy. (shrink)
Ethical analyses of biomedical human enhancement often consider the issue of authenticity — to what degree can the accomplishments of those utilizing biomedical enhancements be considered authentic or worthy of praise? As research into Brain-Computer Interface technology progresses, it may soon be feasible to create a BCI device that enhances or augments natural human intelligence through some invasive or noninvasive biomedical means. In this article we will review currently existing BCI technologies and to what extent these can be said to (...) enhance or augment the capabilities of the respective users, describe one hypothetical type of BCI device that could augment or enhance a specific aspect of human knowledge — namely, mathematical ability, and relate these concepts to the active externalism view of the extended mind as espoused by Clark and Chalmers in order to argue that knowledge of mathematics derived from the usage of a BCI and the application thereof constitutes authentic knowledge and achievement. (shrink)
The inherence heuristic offers modest insights into the complex nature of both the is–oughttension in moral reasoning and moral reasoning per se, and does not reflect the complexity of domain-specific moral heuristics. Formal and general in nature, we contextualize the process described as “inherence heuristic” in a web of domain-specific heuristics.
The authors interpret the data to mean that patients think that their physicians should make relevant decisions in Learning Health System based trials, and label that as being of 'utmost importance'. However, the patients themselves (in the excerpts provided) emphasize that trust in physicians is instrumental for obtaining protection of patient's bests interests (which seems to be of utmost importance for patients). Furthermore, the perceived bias regarding outcome certainty deserves more discussion. Namely, the decision to defer to physician's opinion is (...) linked to perceived certainty of best clinical outcomes and instrumental for protection of best interest, while it lacks appreciation of the level of uncertainty that exists in clinical decision-making. Finally, a discussion on what are the implications of patient perspectives for individual, vs. relational autonomy is something the authors don't pursue, but instead use "physician-patient autonomy" throughout the paper. (shrink)
As artificial intelligence technologies become increasingly prominent in our daily lives, media coverage of the ethical considerations of these technologies has followed suit. Since previous research has shown that media coverage can drive public discourse about novel technologies, studying how the ethical issues of AI are portrayed in the media may lead to greater insight into the potential ramifications of this public discourse, particularly with regard to development and regulation of AI. This paper expands upon previous research by systematically analyzing (...) and categorizing the media portrayal of the ethical issues of AI to better understand how media coverage of these issues may shape public debate about AI. Our results suggest that the media has a fairly realistic and practical focus in its coverage of the ethics of AI, but that the coverage is still shallow. A multifaceted approach to handling the social, ethical and policy issues of AI technology is needed, including increasing the accessibility of correct information to the public in the form of fact sheets and ethical value statements on trusted webpages, collaboration and inclusion of ethics and AI experts in both research and public debate, and consistent government policies or regulatory frameworks for AI technology. (shrink)
Many new scholars have emerged and started to explore novel directions of research in neuroethics. Last year, we hosted the Montreal Neuroethics Conference for Young Researchers to highlight the development of these new scholars and to honour the evolving complexity of the field. As part of this conference, we invited young researchers involved in neuroethics all around the world to submit their work for consideration in an essay contest. Here, we proudly introduce the three best essays we received for this (...) competition and a collection of 21 top-ranked abstracts for the poster contest. (shrink)
The concept of free will has been heavily debated in philosophy and the social sciences. Its alleged importance lies in its association with phenomena fundamental to our understandings of self, such as autonomy, freedom, self-control, agency, and moral responsibility. Consequently, when neuroscience research is interpreted as challenging or even invalidating this concept, a number of heated social and ethical debates surface. We undertook a content analysis of media coverage of Libet’s et al.’s :623–642, 1983) landmark study, which is frequently interpreted (...) as posing a serious challenge to the existence of free will. Media descriptions of Libet et al.’s experiment provided limited details about the original study. Overall, many media articles reported that Libet et al.’s experiments undermined the existence of free will, despite acknowledging that several methodological limitations had been identified in the literature. A propensity to attribute greater credibility than warranted to neurobiological explanations could be at stake. (shrink)
Brain–Computer Interface technology is a promising research area in many domains. Brain activity can be interpreted through both invasive and non-invasive monitoring devices, allowing for novel, therapeutic solutions for individuals with disabilities and for other non-medical applications. However, a number of ethical issues have been identified from the use of BCI technology. In this paper, we review the academic discussion of the ethical implications of BCI technology in the last five years. We conclude that some emerging applications of BCI technology—including (...) commercial ventures that seek to meld human intelligence with AI—present new and unique ethical concerns. Further, we seek to understand how academic literature on the topic of BCIs addresses these novel concerns. Similar to prior work, we use a limited sample to identify trends and areas of concern or debate among researchers and ethicists. From our analysis, we identify two key areas of BCI ethics that warrant further research: the physical and psychological effects of BCI technology. Additionally, questions of BCI policy have not yet become a frequent point of discussion in the relevant literature on BCI ethics, and we argue this should be addressed in future work. We provide guiding questions that will help ethicists and policy makers grapple with the most important issues associated with BCI technology. (shrink)
Empirical neuroethics models have always had normative ambitions. Older models attempted to debunk traditional moral theories, whereas newer models attempt to fit their empirical and normative claims with them. The issue of normative significance as it pertains to the use of social science methodology on moral intuitions remains open. This paper analyzes the Is/Ought gap and the empirical underpinnings of influential constructivist approaches in order to argue that the normative ambitions of empirical neuroethics models are not necessarily always misguided. The (...) author clarifies how legitimate normative implications can be dissociated from overreaches and argues that moral intuitions could be used as the factual basis for ethics by employing the distinction between natural facts, social facts, and social constructs. Ultimately, morality can be fruitfully studied and informed by natural and social sciences and, thorough ethical reflection, ought also to inform empirical research. (shrink)
Although former Yugoslavia constituted what was widely held to be the most "promising" communist country in terms of potentials for economic reform and political democratization, Serbia remained the only East European country in which the former communist elite managed to defeat its opponents in a series of elections and preserve important elements of institutional and ideological continuity with the old system. Moreover, its regime played a conspicuous role in Yugoslavia's violent collapse. In the specialist literature, the "Serbian exceptionalism" thesis has (...) been elaborated in a number of forms. These are critically reviewed in the first part of the paper, classifying the paradigms according to whether they emphasize: 1) Serbian traditionalist, authoritarian, and collectivist political culture, 2) the affinity between traditional Serbian national populism, Russophile anti-Westernism, and communism, 3) the exclusivist and assimilating character of Serbian nationalism, or 4) the appeals of the contemporary Serbian political elite led by S. Milosevic. In the second part of the paper an alternative explanation is presented that seeks to be both interpretively adequate and causally plausible. It rests on five basic factors: 1) historical legacy ; 2) institutional analysis ; 3) ideology ; 4) leadership and social base ; and 5) the role of the Diaspora.. Iako se pre 1990. smatralo da bivsa Jugoslavija medju svim komunistickim zemljama ima najbolje potencijale za ekonomsku reformu i politicku demokratizaciju, Srbija je ostala jedina istocnoevropska zemlja u kojoj je nekadasnjoj komunistickoj eliti poslo za rukom da porazi svoje protivnike u nekoliko uzastopnih izbornih nadmetanja i da ocuva znacajne elemente institucionalnog i ideoloskog kontinuiteta sa starim sistemom. Stavise, taj je rezim igrao krupnu ulogu u nasilnom raspadu SFRJ. U specijalistickoj literaturi, teza o "srpskoj izuzetnosti" razvijana je u razlicitim formama, cijem kritickom razmatranju je posvecen prvi deo rada. Identifikovano je nekoliko paradigmi, u zavisnosti od toga da li osnovni naglasak stavljaju na: 1) tradicionalisticku, autoritarnu i kolektivisticku politicku kulturu Srba, 2) afinitet izmedju tradicionalnog srpskog nacionalnog populizma, rusofilskog antizapadnjastva i komunizma, 3) ekskluzivisticku i asimilacionisticku prirodu srpskog nacionalizma, ili pak 4) odlike savremene srpske politicke elite na celu sa S. Milosevicem. U drugom delu rada izlozio je alternativno objasnjenje, ciji su glavni oslonci: 1) istorijsko nasledje, 2) institucionalna analiza, 3) ideologija, 4) osobine vodja i drustvena baza i 5) uloga dijaspore.. (shrink)
The debate on “cognitive enhancement” has moved from discussions about enhancement in adults to enhancement in children and adolescents. Similar to positions expressed in the adult context, some have argued that pediatric cognitive enhancement is acceptable and even laudable. However, the implications differ between the adult and the pediatric contexts. For example, in the debate over cognitive enhancement in adults, i.e., those who have legal majority, respect for autonomy demands that personal preferences not be overridden in absence of strong arguments (...) because competent adults are in the best position to recognize and protect their own interests. However, the concepts of best interest and autonomy provide a different picture in the case of pediatric enhancement. In the context of decision-making involving minors, it is assumed that the parents are in the best position to promote and protect the interests of their children and this is chiefly why they are granted the authority to make decisions on their behalf. However, we argue in favor of guarding the physical integrity of children from intrusive medical interventions without medical need and with clear and detrimental effects. We also support leaving open other legitimate life trajectory and career choices, as this is in the best interest of the child, even if they are less in line with the expectations of parents or success in educational settings. In addition, parental decision-making in favor of cognitive enhancement suffers from a lack of information about cognitive enhancers and potential biases. Thus, bearing in mind these issues and the development of volitional capacities of children, we argue that pediatric enhancement is not a morally acceptable practice and “inevitability” can be curbed with clear and fair rules that establish duties of state representatives, physicians, and public institutions. We conclude by canvassing evidence-based policy options that could protect the open future of minors and define the parameters of parental decision-making analogous to the cases of nicotine and alcohol. (shrink)
In my target article, I analyzed available information and policy options for the two of the most commonly used cognitive enhancement (CE) drugs: Adderall and Ritalin. I concluded that for all forms of amphetamine, including Adderall, and for instant-release forms of methylphenidate, any form of sale beyond prescription for therapeutic purposes needs to be prohibited, while some form of a taxation approach and the economic disincentives model (EDM) in particular could be an option for public policy on extended-release forms of (...) methylphenidate . However, there has been a considerable amount of constructive criticism regarding my proposal. Some neuroethicists objected to my favoring prohibitive policies to dangerous CE drugs such as amphetamine and argued for laissez-faire or even mandatory use of enhancements. Others took issue with the conclusion that the economic disincentives model (EDM) could be an option for public policy on extended release forms of methylphenidate. Furthermore, there are those that think my argument in general and EDM in particular are failing to address the relevant issues in regulation of CE, such as social justice and real autonomy. Finally, there are those who offer suggestions on how the argument and the model of public policy for CE drugs can be improved. These comments are greatly appreciated, and I hope that my responses have captured the issues they were concerned with. (shrink)
The organizers and members of the international abstract review committee conducted anonymous review of all abstracts from the conference for merit based on relevance, originality, strength and clarity of methods and analyses, and overall contribution to the field of neuroethics. Here, we proudly introduce the collection of 21 top-ranked abstracts for the poster contest.
Willpower has ramifications for autonomy and mental time-travel. Autonomy presupposes mature powers of volition and the capacity to anticipate future events and consequences of one's actions. Ainslie's study is useful to clarify basic autonomy in addiction and dementia. Furthermore, we show how our study on coping with stress can be applied to suppression and resolve.
Neuroscientific findings have often been argued to undermine notions of free will and to require far-reaching changes of our political and legal systems. Making a difference between the metaphysical notion of free will and the political notion of autonomy,Dubljevi´c (2013) argues this switchover to be mistaken. While we appreciate attention to the social limits of neuroscientific findings, we also have a twofold concern with his proposal. The first covers the nontransparent way in which he either rejects or embraces certain scientific (...) findings, which renders the background andmotivation of his argument unclear. The second revolves around his idea of a “rational life-plan,” which, while it covers a person’s capacity to conform to social and external factors, misses out what it means to act for a reason or be the source of one’s actions. Revisiting the example of former addict Tommy McHugh and invoking the example of a resigned addict, we present the idea of an “autonomous life-plan,” which is metaphysically sound and practically relevant. (shrink)
