In 1952, Heinrich Scholz published a question in The Journal of Symbolic Logic asking for a characterization of spectra, i.e., sets of natural numbers that are the cardinalities of finite models of first order sentences. Günter Asser in turn asked whether the complement of a spectrum is always a spectrum. These innocent questions turned out to be seminal for the development of finite model theory and descriptive complexity. In this paper we survey developments over the last 50-odd years pertaining to (...) the spectrum problem. Our presentation follows conceptual developments rather than the chronological order. Originally a number theoretic problem, it has been approached by means of recursion theory, resource bounded complexity theory, classification by complexity of the defining sentences, and finally by means of structural graph theory. Although Scholz' question was answered in various ways, Asser's question remains open. (shrink)

Objectives: To discover the current state of opinion and practice among doctors in Victoria, Australia, regarding end-of-life decisions and the legalisation of voluntary euthanasia. Longitudinal comparison with similar 1987 and 1993 studies.Design and participants: Cross-sectional postal survey of doctors in Victoria.Results: 53% of doctors in Victoria support the legalisation of voluntary euthanasia. Of doctors who have experienced requests from patients to hasten death, 35% have administered drugs with the intention of hastening death. There is substantial disagreement among doctors concerning the (...) definition of euthanasia.Conclusions: Disagreement among doctors concerning the meaning of the term euthanasia may contribute to misunderstanding in the debate over voluntary euthanasia. Among doctors in Victoria, support for the legalisation of voluntary euthanasia appears to have weakened slightly over the past 17 years. Opinion on this issue is sharply polarised. (shrink)

Volume 20, Issue 7, July 2020, Page 147-150.

This book is structured in a practical, example-driven, manner. The use of VHDL for constructing logic synthesisers is one of the aims of the book; the second is the application of the tools to the design process. Worked examples, questions and answers are provided together with do and don'ts of good practice. An appendix on logic design the source code are available free of charge over the Internet.

ObjectiveIn this study, we extend the impact of mindfulness to the concept of least-worst decision-making. Least-worst decisions involve high-uncertainty and require the individual to choose between a number of potentially negative courses of action. Research is increasingly exploring least-worst decisions, and real-world events (such as the COVID-19 pandemic) show the need for individuals to overcome uncertainty and commit to a least-worst course of action. From sports to business, researchers are increasingly showing that “being mindful” has a range of positive performance-related (...) benefits. We hypothesized that mindfulness would improve least-worst decision-making because it would increase self-reflection and value identification. However, we also hypothesized that trait maximization (the tendency to attempt to choose the “best” course of action) would negatively interact with mindfulness.MethodsThree hundred and ninety-eight participants were recruited using Amazon MTurk and exposed to a brief mindfulness intervention or a control intervention (listening to an audiobook). After this intervention, participants completed the Least-Worst Uncertain Choice Inventory for Emergency Responders (LUCIFER).ResultsAs hypothesized, mindfulness increased decision-making speed and approach-tendencies. Conversely, for high-maximizers, increased mindfulness caused a slowing of the decision-making process and led to more avoidant choices.ConclusionsThis study shows the potential positive and negative consequences of mindfulness for least-worst decision-making, emphasizing the critical importance of individual differences when considering both the effect of mindfulness and interventions aimed at improving decision-making. (shrink)

Both scientists and children make important structural discoveries, yet their computational underpinnings are not well understood. Structure discovery has previously been formalized as probabilistic inference about the right structural form—where form could be a tree, ring, chain, grid, etc.. Although this approach can learn intuitive organizations, including a tree for animals and a ring for the color circle, it assumes a strong inductive bias that considers only these particular forms, and each form is explicitly provided as initial knowledge. Here we (...) introduce a new computational model of how organizing structure can be discovered, utilizing a broad hypothesis space with a preference for sparse connectivity. Given that the inductive bias is more general, the model's initial knowledge shows little qualitative resemblance to some of the discoveries it supports. As a consequence, the model can also learn complex structures for domains that lack intuitive description, as well as predict human property induction judgments without explicit structural forms. By allowing form to emerge from sparsity, our approach clarifies how both the richness and flexibility of human conceptual organization can coexist. (shrink)

Upshot: We seek to address several questions and statements made in the commentaries by elaborating on the four main aspects of the M-N-L framework. Before doing so, we discuss the issue of constructivist teaching in the context of schools. We conclude by hypothesizing on what would be lost in the M-N-L framework by taking constructivism out of the picture.

Context: Constructivist teachers who find themselves working within an educational system that adopts a realist epistemology, may find themselves at odds with their own beliefs when they catch themselves paying closer attention to the knowledge authorities intend them to teach rather than the knowledge being constructed by their learners. Method: In the preliminary analysis of the mathematical learning of six low-performing Year 7 boys in a Maltese secondary school, whom one of us taught during the scholastic year 2014-15, we constructed (...) a conceptual framework which would help us analyze the extent to which he managed to be sensitive to constructivism in a typical classroom setting. We describe the development of the framework M-N-L as a viable analytical tool to search for significant moments in the lessons in which the teacher appeared to engage in what we define as “constructivist teaching” during mathematics lessons. The development of M-N-L is part of a research program investigating the way low-performing students make mathematical sense of new notation with the help of the software Grid Algebra. Results: M-N-L was found to be an effective instrument which helped to determine the extent to which the teacher was sensitive to his own constructivist beliefs while trying to negotiate a balance between the mathematical concepts he was expected to teach and the conceptual constructions of his students. Implications: One major implication is that it is indeed possible for mathematics teachers to be sensitive to the individual constructions of their learners without losing sight of the concepts that society, represented by curriculum planners, deems necessary for students to learn. The other is that researchers in the field of education may find M-N-L a helpful tool to analyze CT during typical didactical situations established in classroom settings. (shrink)

This interdisciplinary collection of essays highlights the relevance of Buddhist doctrine and practice to issues of globalization. From philosophical, religious, historical, and political perspectives, the authors show that Buddhism—arguably the world’s first transnational religion—is a rich resource for navigating todays interconnected world.

Unrealistic optimism is a bias that leads people to believe, with respect to a specific event or hazard, that they are more likely to experience positive outcomes and/or less likely to experience negative outcomes than similar others. The phenomenon has been seen in a range of health-related contexts—including when prospective participants are presented with the risks and benefits of participating in a clinical trial. In order to test for the prevalence of unrealistic optimism among participants of early-phase oncology trials, we (...) conducted a survey with patients over 18 years of age who were enrolled in a phase I, phase I/II, or phase II clinical cancer trial in the New York City area between August 2008 and October 2009. Participants in our study were asked to compare their own chances of experiencing a range of risks and benefits related to the trial they were enrolled in with the chances of the other trial participants. We found a significant optimistic bias in their responses. Respondents tended to overestimate the benefits of the trial they were enrolled in and underestimate its risks. In addition, we found no significant relationship between respondents’ understanding of the trial’s purpose and how susceptible they were to unrealistic optimism. Our findings suggest that improving the consent process for oncology studies requires more than addressing deficits in understanding. (shrink)

Purpose Recent research has found unrealistic optimism among patient-subjects in early-phase oncology trials. Our aim was to investigate the cognitive and motivational factors that evoke this bias in this context. We expected perceptions of control to be a strong correlate of unrealistic optimism. Methods A study of patient-subjects enrolled in early-phase oncology trials was conducted at two sites in the USA. Respondents completed questionnaires designed to assess unrealistic optimism and several risk attribute variables that have been found to evoke the (...) bias in other contexts. Results One hundred and seventy-one patient-subjects agreed to be interviewed for our study. Significant levels of perceived controllability were found with respect to all nine research-related questions. Perceptions of control were found to predict unrealistic optimism. Two other risk attribute variables, awareness of indicators and mental image, were correlated with unrealistic optimism. However, in multivariate regression analysis, awareness and mental image dropped out of the model and perceived controllability was the only factor independently associated with unrealistic optimism. Conclusion Patient-subjects reported that they can, at least partially, control the benefits they receive from participating in an early-phase oncology trial. This sense of control may underlie unrealistic optimism about benefiting personally from trial participation. Effective interventions to counteract unrealistic optimism may need to address the psychological factors that give rise to distorted risk/benefit processing. (shrink)

New Jersey residents who tested their homes for radon and found more than four picocuries per liter were surveyed about their knowledge, emotions, attitudes, and intentions to take remedial action Respondents proved well informed, but radon levels were not highly correlated with any of the response variables. Overoptimism was more common than overreaction. The results suggest that active guidance is needed to ensure appropriate responses to environmental hazards, like radon, that require individual remediation. Simple information dissemination alone seems inadequate.

The aim of this exploratory study was to examine client demographics and expectations, reasons for use, sensations during treatment, and perceived outcomes of Pranic Healing, an energy healing system lacking in scientific documentation but whose use in the general population is becoming more widespread internationally. This study consisted of a cross-sectional survey of adults (18+ years of age) receiving care from 12 Pranic Healing practices in four different states in the U.S. (N = 179) completing online questionnaires. Closed-ended response sets (...) were analyzed descriptively, while qualitative data were analyzed using content analysis. Reasons to use the therapy included physical, mental/emotional, and metaphysical issues, dissatisfaction with conventional care, and overall well-being. Expectations of care included enhanced abilities, cure or relief, or unsure. Respondents were more likely to cite a specific problem from which they needed alleviation than to cite overall health or wellness as their goal. Sensations experienced were reported to be of a relaxing nature and not, as was hypothesized, of an energizing nature. Results show that those who use Pranic Healing fit the sociodemographic profile of CAM (complementary and alternative medicine) users in the United States, that their reasons for use are not homogeneous, and that preliminary descriptive data from a selective subsample of respondents indicated that some respondents are experiencing positive outcomes attributed to this modality. (shrink)

Recent reports of CRISPR/Cas9 genome editing in parasitic helminths open up new avenues for research on these dangerous pathogens. However, the complex morphology and life cycles inherent to these parasites present obstacles for the efficient application of CRISPR/Cas9‐targeted mutagenesis. This is especially true with the trematode flukes where only modest levels of gene mutation efficiency have been achieved. Current major challenges in the application of CRISPR/Cas9 for study of parasitic worms thus lie in enhancing gene mutation efficiency and overcoming issues (...) involved in host passage so that mutated parasites survive. Strategies developed for CRISPR/Cas9 studies on Caenorhabditis elegans, protozoa and mammalian cells, including novel delivery methods, the choice of selectable markers, and refining mutation precision represent novel tactics whereby these impediments can be overcome. Furthermore, employing CRISPR/Cas9‐mediated gene drive to interfere with vector transmission represents a novel approach for the control of parasitic worms that is worthy of further exploration. (shrink)

In their article, Pavarani and colleagues offer a vision of evolutionary bioethics that focuses on innovation and empirical research as a means to enrich the field of bioethics. Empirical bi...

Are moral properties intellectually indispensable, and, if so, what consequences does this have for our understanding of their nature, and of our talk and knowledge of them? Are mathematical objects intellectually indispensable, and, if so, what consequences does this have for our understanding of their nature, and of our talk and knowledge of them? What similarities are there, if any, in the answers to the first two questions? Can comparison of the two cases shed light on which answers are most (...) plausible in either case? This chapter – the introduction to the volume Explanation in Ethics and Mathematics – elucidates these questions and sketches their history. (shrink)

Essays devoted to the work of the late Neil Wilson, Canadian philosopher and contributor to the field of semantic analysis that emerged from the fusion of logic, pragmatism, and ontology. Many of the essays in this volume take their initial inspiration from Wilson's seminal work Substances Without Substrata.

The political theory of Richard Vernon has been a guiding light for students of politics for over five decades. From the situated ethics of shared citizenship to the normative character of individuals' connections to members of other societies and generations, Vernon has cleared a distinctive course in his contributions to the many complex dimensions of political morality. Justice, Rights, and Toleration centres on the core ideas that animate Vernon's engagement with the problems of political theory. Contributors to this volume - (...) all former students and colleagues of Vernon - offer critical engagement with the fundamental themes threaded throughout the thinker's work on the perennial political challenges in liberal democratic societies, including the understanding of citizenship and political membership, justice within and between nations and generations, the rights of children and parents, and the idea of toleration. Vernon articulated a clear vision of the nature of these problems as well as a nuanced approach to addressing them, one rooted in the ideas of democratic dialogue and justice. The essays in this volume are a testament to the breadth of the pressing issues on which Vernon's work continues to advance critical insights. Justice, Rights, and Toleration provides a worthy tribute to the wide range of Richard Vernon's interests and the inspiration to be found in his deep yet subtle body of work in political theory. (shrink)

Moving back and forth between the history of philosophy and the contributions of philosophers in his own day, Durkheim takes up topics as diverse as philosophical psychology, logic, ethics, and metaphysics, and seeks to articulate a unified philosophical position. Remarkably, in these lectures, given more than a decade before the publication of his groundbreaking book, The Division of Labour in Society, the 'social realism' that is so characteristic of his later work - where he insists, famously, that social facts cannot (...) be reduced to psychological or economic ones, and that such facts constrain human action in important ways - is totally absent in these early lectures. For this reason, they will be of special interest to students of the history of the social sciences, for they shed important light on the course of Durkheim's intellectual development. (shrink)

Coursebook on law and neuroscience, including the bearing of neuroscience on criminal law, criminal procedure, and evidence.

How far should our realism extend? For many years philosophers of mathematics and philosophers of ethics have worked independently to address the question of how best to understand the entities apparently referred to by mathematical and ethical talk. But the similarities between their endeavours are not often emphasised. This book provides that emphasis. In particular, it focuses on two types of argumentative strategies that have been deployed in both areas. The first—debunking arguments—aims to put pressure on realism by emphasising the (...) seeming redundancy of mathematical or moral entities when it comes to explaining our judgements. In the moral realm this challenge has been made by Gilbert Harman and Sharon Street; in the mathematical realm it is known as the 'Benacerraf-Field' problem. The second strategy—indispensability arguments—aims to provide support for realism by emphasising the seeming intellectual indispensability of mathematical or moral entities, for example when constructing good explanatory theories. This strategy is associated with Quine and Putnam in mathematics and with Nicholas Sturgeon and David Enoch in ethics. Explanation in Ethics and Mathematics addresses these issues through an explicitly comparative methodology which we call the 'companions in illumination' approach. By considering how argumentative strategies in the philosophy of mathematics might apply to the philosophy of ethics, and vice versa, the papers collected here break new ground in both areas. For good measure, two further companions for illumination are also broached: the philosophy of chance and the philosophy of religion. Collectively, these comparisons light up new questions, arguments, and problems of interest to scholars interested in realism in any area. (shrink)

The Cayman Turtle Farm is the only facility in the world that commercially produces green sea turtles for human consumption. The CTF has operated at a significant financial loss for much of its 45 years history and is maintained by substantial Cayman Island Government subsidies. These subsidies run into millions of Caymanian dollars and dwarf the funding allocated to The Caymanian Department of Environment to protect its unique biodiversity each year. We argue that it is time for the CTF to (...) terminate its sea turtle ‘farming’ initiative. Supporters argue that the CTF helps to conserve green turtles by providing legal and sustainable turtle meat for local Caymanian consumption. Opponents maintain that farmed turtle meat cannot serve as an effective economically viable substitute, and that the facility potentially harms Caribbean green turtle populations by promoting turtle meat consumption, when other Caribbean nations increasingly prohibit this practice. The CTF’s records demonstrate that commercial production has come at the expense of tens of thousands of sea turtles. We question the ethics of sea turtle farming and argue that the CTF could better contribute to conservation if it transitioned into a rehabilitation, research and education facility . Recommended first steps include prohibiting the sale of sea turtle products to international tourists, engaging with stakeholders, and assessing the true scale of local consumer demand for green turtle meat. (shrink)

The United Nations General Assembly adopted the Universal Declaration of Human Rights in 1948. A burgeoning human rights movement followed, yielding many treaties and new international institutions and shaping the constitutions and laws of many states. Yet human rights continue to be contested politically and legally and there is substantial philosophical and theoretical debate over their foundations and implications. In this volume distinguished philosophers, political scientists, international lawyers, environmentalists and anthropologists discuss some of the most difficult questions of human rights (...) theory and practice: What do human rights require of the global economy? Does it make sense to secure them by force? What do they require in jus post bello contexts of transitional justice? Is global climate change a human rights issue? Is there a human right to democracy? Does the human rights movement constitute moral progress? For students of political philosophy, human rights, peace studies, and international relations. (shrink)