It is posited that the initiating event of amphibian regeneration of a limb, is retrodifferentiation* of what are to become the developing cells of the blastema. These cells reiterate a larval or premetamorphic ontogenic repertoire, induced by elevated levels of prolactin with adequate innervation. Subsequent redifferentiation of the blastema cells occurs, controlled by thyroxine and innervation.This temporal displacement of cellular morphologic characters in regeneration should be looked upon as a function of the ability to reiterate larval characters and subsequently metamorphose. (...) If correct, this would explain why amphibians which metamorphose only once, lose the ability to postmetamorphically regenerate. An exception to this,Xenopus laevis, an anuran which can epimorphically regenerate, to some extent, will be discussed.[/p]. (shrink)

Variation or rearrangement of regulatory genes is responsible for cellular malignant change. These types of chromosomal variations also produce heterochrony or paedomorphic evolution at the organismal level. Analogously, neoplasia represents a cellular macroevolutionary event, and a tumour can be said to be an evolved population of cells. To understand this cellular evolution to malignancy, it may be necessary to go beyond a clonal selection (adaptationist) explanation of neoplastic alteration. In the pericellular environment natural selection consists of the organizational restraints of (...) surrounding cells as well as the host's immunological surveillance and non-specific monocyte-macrophage systems. Indirect evidence suggests that success for the neoplasm depends not upon clonal selection, but solely upon a genetic methodology—the function of which is to elude selection.The author has coined the term cellular heterochrony to illustrate analogic similarities in the molecular modes of speciation between anaplastic cancer cells and the heterochronic evolution of organisms. By reverting to a juvenile (embryonic) repertoire of cellular behaviour a tumour secures its own tenure or niche by usurping the host's armamentarium of selection forces, employing many of the same or similar methods by which implanting and invading tissues of the mammalian embryo forestall maternal detection and rejection. A number of ways by which the tumour blocks, subverts or evades selection are discussed. (shrink)

Regeneration in arthropods and amphibians follows an analogous principle making comparisons between the two phyla possible.Larval arthropods and amphibians possess powers of epimorphic regeneration which wane for many species of these phyla with the completion of metamorphosis or the cessation of moulting. In those species which retain, post-maturationally, the ability to form a regenerative blastema, larval characteristics are carried into the adult and reproductive stages of these organisms. These include many species of: urodeles, ametabolous insects, crustaceans, myriapods and arachnids. The (...) long-standing distinction between embryonic regulation and true epimorphosis would thus appear to be a difference of degree rather than kind. (shrink)

When it comes to using patient data from the National Health Service for research, we are often told that it is a matter of trust: we need to trust, we need to build trust, we need to restore trust. Various policy papers and reports articulate and develop these ideas and make very important contributions to public dialogue on the trustworthiness of our research institutions. But these documents and policies are apparently constructed with little sustained reflection on the nature of trust (...) and trustworthiness, and therefore are missing important features that matter for how we manage concerns related to trust. We suggest that what we mean by ‘trust’ and ‘trustworthiness’ matters and should affect the policies and guidance that govern data sharing in the NHS. We offer a number of initial, general reflections on the way in which some of these features might affect our approach to principles, policies and strategies that are related to sharing patient data for research. This paper is the outcome of a ‘public ethics’ coproduction activity which involved members of the public and two academic ethicists. Our task was to consider collectively the accounts of trust developed by philosophers as they applied in the context of the NHS and to coproduce an argumentative position relevant to this context. (shrink)

Gregory Bateson’s career from anthropologist, through his development of cybernetics and systems theory, to developing ideas around ‘the sacred’, has parallels with Roy Bhaskar’s intellectual journey. This paper proposes that as well as Bateson’s theory of cybernetics and systemic thought making a contribution to basic and dialectic critical realism, his final and posthumously published Angels Fear: Towards and Epistemology of the Sacred adds to our understanding of Bhaskar’s metaReality. Similarities between the development of Bateson’s work from 1936 to 1987 and (...) Bhaskar’s work from 1975 to 2016 enable the development of theory that adds to both of their respective appreciations of metaReality and the sacred. Thus, by starting a conversation between Bateson and Bhaskar, we can develop a higher order understanding of the world than proposed by Bhaskar’s metaReality alone. (shrink)

In The Virtual, Rob Shields puts virtuality in with the key categories of contemporary social theory such as subjectivity, agency, structure, and the spaces and temporalities between the modern and the postmodern. Shields has rescued the term and the idea of the virtual from utopian futurists like Howard Rheingold and Nicholas Negroponte who use it to hype emergent technologies and forms of culture as the magical vehicles and entry points to new worlds and identities. The works of these digerati, ideologues (...) for multimedia technology and culture, now appear ideological, outdated, and no more than huckstering of the new when confronted with the current state of affairs in the technoculture and its attendant war- and terrorism-torn world. (shrink)

This paper looks around among the major traditional fallacies — centering mainly around the so-called “gang of eighteen” — to discuss which of them should properly be classified as fallacies of relevance. The paper argues that four of these fallacies are fallacies primarily because they are failures of relevance in argumentation, while others are fallacies in a way that is more peripherally related to failures of relevance. Still others have an even more tangential relation to failures of relevance. This paper (...) is part of a larger research project on dialecical relevance in argumentative discourse, currently underway in collaboration with Frans van Eemeren and Rob Grootendorst. (shrink)

The relevance to decision research of recent advances in the philosophy of social science is considered. The critical realism of Roy Bhaskar argues for the identification of contextually contingent explanatory mechanisms at multiple levels based on concepts grounded in intersubjectively shared reality. Using examples from the author’s and other’s research on the psychology of decisions involving risk and uncertainty, this paper explores the implications of taking a critical realist approach. It is argued that critical realism has the potential to advance (...) and unify disparate experimental and naturalistic lines of research. Furthermore, a diverse range of experimental, process-tracing and observational methods can play important complementary roles in developing fruitful critical realist explanations of decisions involving risk and uncertainty. (shrink)

Plato provocatively characterizes truth $$ in terms of harmony $$ at various points throughout his dialogues. While limited attention has been directed toward the role of musical concepts in Plato's general cosmology, not any attention has been directed toward how musical concepts function in relation to Plato's characterization of truth. In fact, this issue has had little occasion for consideration. Almost every contemporary translator empties terms such as $\grave\alpha\rho\mu o\nu\acute\iota\alpha,$ when co-incidental with $\acute\alpha\lambda\acute\eta\theta\varepsilon\iota\alpha,$ of their musical content. As a consequence, (...) I argue, Plato's characterization of truth is made readily amenable to contemporary conceptions of truth-not necessarily a good thing since it robs us of the original richness of Plato's thought. The dissertation explores how retaining the aural meaning latent within $\grave\alpha\rho\mu o\nu\acute\iota\alpha$ and other terms of musical import serves to elucidate the rich complexion of Plato's notion of $\acute\alpha\lambda\acute\eta\theta\varepsilon\iota\alpha.$ Ultimately, I show how Plato's use of musical terminology to characterize truth informs other features of his philosophical outlook, illustrate the cohesiveness and consistency of key texts believed problematic by other commentators, and underscore significant differences between Plato's $\acute\alpha\lambda\acute\eta\theta\varepsilon\iota\alpha$ and ideas of truth prevalent today. ;For Plato, I argue $\acute\alpha\lambda\acute\eta\theta\varepsilon\iota\alpha$ bears a meaning different from its primitive sense of oracular unconcealment and its later sense of correctness $,$ and a meaning also different from other terminological alternatives $.$ Truth, accordingly, turns out for Plato to be neither mysterious and groundless nor a matter of simple correspondence to an objective reality. The value of Plato's conception of truth as harmony consists in its ability to avoid the polarity of contemporary conceptions of truth as either objectively determinate or subjectively determinate . Truth is neither arbitrarily imposed upon the world by us, nor artificially imposed upon us by an antecedently structured and independent reality. The dissertation concludes by articulating reasons for favoring Plato's theory of truth, while noting a few underlying assumptions likely problematic for some contemporary philosophers. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy and Rhetoric 33.2 (2000) 101-115 [Access article in PDF] Case Study of the Use of a Circumstantial Ad Hominem in Political Argumentation Douglas Walton In the 1860s, Northern newspapers attacked Lincoln's policies by attacking his character, using the terms drunk, baboon, too slow, foolish, and dishonest. Steadily on the increase in political argumentation since then, the argumentum ad hominem has been carefully refined as an instrument of (...) "oppo tactics" and "going negative" by the public relations experts who now craft political campaigns at the national level. It has been so prominently used in the major political campaigns, debates, and advertisements of the past few years that there has even been a reaction against it--a feeling that we have gone too far in this direction and that some kind of restraint is needed. 1 But there has been no evidence of such restraint in the argumentation used in recent campaigns. Perhaps what might be helpful is a better understanding on the part of voters and campaigners of how to evaluate ad hominem arguments critically.How does the ad hominem argument really work as a way of molding public opinion, why is it so often so effective, and how can it be defended against? How can it be evaluated as a clearly identifiable type of argument, by some kind of objective standards, in a way that can be applied to particular cases? These appear to be tough questions, but recent research has made some not inconsiderable progress toward answering them.The purpose of this article is to present a new case study of a type of argument commonly used in political discourse, a case study that makes use of the dialectical normative framework for identifying and evaluating personal attack (ad hominem) arguments that is developed in a series of works by Henry W. Johnstone Jr. (1952); Alan Brinton (1985, 1995); Frans H. van Eemeren and Rob Grootendorst (1984, 1995); Erik C. W. Krabbe and Douglas N. Walton (1993), Walton (1989, chap. 6; 1998); and van Eemeren, Grootendorst, Francisca Snoeck Henkemans et al. (1996). This particular case, although typical of so many ad hominem arguments currently [End Page 101] in use in political discourse, has some special features that turn out to be quite interesting not only in showing how the dialectical framework applies to cases, but also in advancing our knowledge of how the ad hominem type of argument works in political argumentation in a democratic system for which the media reportage of events is a big factor in influencing voting. 1. Framework for analysis and evaluation Although the argumentum ad hominem, or personal attack argument, has been traditionally treated as a fallacy in logic, recent research in argumentation (as cited above) shows that, in many cases,--including cases in political argumentation--ad hominem arguments, as used in conversational arguments, are not fallacious. Research has shown that, while some personal attack arguments can definitely be judged fallacious, many others are quite reasonable (when evaluated in the appropriate context), while still others should be evaluated as weak (insufficiently supported) but not fallacious. As shown in this case study, the real function of an ad hominem argument (when properly used) is to attack an arguer's credibility in order to criticize the argument she advocates.Before going any further, it is necessary to define some terminology brought to use in the research cited above. An ad hominem argument is the use of personal attack in a dialogue exchange between two parties, where the one party attacks the character of the other party as bad, in some respect, and then uses this attack as a basis for criticizing the other party's argument. An argument is fallacious if it is a special baptizable (Johnson 1987) type of argument that is used by one party in a dialogue exchange in such a way that it blocks or interferes with the collaborative realization of the goal of the type of dialogue in which the two participants are supposed to be engaged (Walton 1995). Thus, there is a difference between a weak... (shrink)

In 2016, this Journal published an article by Rob Lawlor1 on what we might call the acceptance-refusal asymmetry in competence requirements. This is the view that there can be cases in which a patient is sufficiently competent to accept a treatment, but not sufficiently competent to refuse it. Though the main purpose of Lawlor’s paper was to distinguish this asymmetry from various other asymmetries with which it has sometimes been confused,1 Lawlor also presented a brief case in favour of it. (...) Developing an earlier argument of Ian Wilks’,2 3 Lawlor argued that, when the risks associated with refusing a treatment are graver than those associated with accepting it, a higher level of competence may be required to refuse a treatment than to accept it. This claim could have important implications for the law, since determinations of competence often play a central role in determining the lawfulness of refusing or imposing a treatment. Indeed, the acceptance-refusal asymmetry in competence requirements, or something close to it, has played an important role in court judgments.2 However, Lawlor himself suggests that his conclusion will have practical implications only in a narrow range of cases.3 In this issue, Pickering, Giles Newton-Howes and Simon Walker respond to Lawlor’s piece.4 They deny that competence requirements should depend on the level of risk associated with a decision, and thus that there is any basis for the acceptance-refusal asymmetry in competence requirements. Part of the authors’ argument involves contesting the way in which Lawlor uses cases to support his view. In one case cited by Lawlor—and drawn from Wilks—we are invited to consider a whether …. (shrink)

_'Nagel and Newman accomplish the wondrous task of clarifying the argumentative outline of Kurt Godel's celebrated logic bomb.'_ _– The Guardian_ In 1931 the mathematical logician Kurt Godel published a revolutionary paper that challenged certain basic assumptions underpinning mathematics and logic. A colleague of physicist Albert Einstein, his theorem proved that mathematics was partly based on propositions not provable within the mathematical system. The importance of Godel's Proof rests upon its radical implications and has echoed throughout many fields, from maths (...) to science to philosophy, computer design, artificial intelligence, even religion and psychology. While others such as Douglas Hofstadter and Roger Penrose have published bestsellers based on Godel’s theorem, this is the first book to present a readable explanation to both scholars and non-specialists alike. A gripping combination of science and accessibility, _Godel’s Proof_ by Nagel and Newman is for both mathematicians and the idly curious, offering those with a taste for logic and philosophy the chance to satisfy their intellectual curiosity. _Kurt Godel_ Born in Brunn, he was a colleague of physicist Albert Einstein and professor at the Institute for Advanced Study in Princeton, N.J. (shrink)

The prelims comprise: Half Title Title Copyright Contents The Four Noble Truths Foreword by Charles Johnson Prologue: An Ancient Fable.

We describe here an interdisciplinary lab science course for non-majors using the history of science as a curricular guide. Our experience with diverse instructors underscores the importance of the teachers and classroom dynamics, beyond the curriculum. Moreover, the institutional political context is central: are courses for non-majors valued and is support given to instructors to innovate? Two sample projects are profiled.

In commemoration of the 150th birthday of M. K. ‘Mahatma’ Gandhi, Douglas Allen, author of Gandhi After 9/11, presents an overview of Gandhi’s philosophy focused on two key values or concepts: Truth (Satya) and Nonviolence (Ahimsa). The presentation is offered as an alternative to non-Gandhians, anti-Gandhians, or reactionary Gandhians who often over-idealized the man and his philosophy. With respect to Ahimsa or Nonviolence, it may be easy to see how the value works against overt, physical violence. However, for Gandhi (...) such examples are only a small part of violence overall. For Gandhi, violence and nonviolence are multidimensional, encompassing our personal ego-driven desires and our widespread economic exploitations. Each dimension of violence or nonviolence is both causal and conditioning, beginning with the experiences of children. Ahimsa should therefore be approached as relational and interconnected. Gandhi approaches the structural violence of the status quo by insisting upon transformative structural nonviolence. Gandhi’s approach to Truth or Satya requires a distinction between Absolute Truth and relative truth. Although Gandhi works with an experiential knowledge of Absolute Truth, he was not an absolutist. Gandhi’s primary focus was upon relative truth, which yields temporary and imperfect ‘glimpses’ of the absolute. In relations with others, we seek kinship with bearers of relative truth. This is the significance of Gandhi’s claim that means and ends are intertwined. With others we seek mutual discovery of relative truths generating greater relative truth. Gandhi’s well known Absolute Nonviolence may prevent us from apprehending its relationship to relative transformations in contextual situations. (shrink)

Our present actions can have effects on future generations - affecting not only the environment they will inherit, but even perhaps their very existence. This raises a number of important moral issues, many of which have only recently received serious philosophical attention. I begin by discussing some contemporary Western philosophical perspectives on the problem of our obligations to future generations, and then go on to consider how these approaches might relate to the classical Indian philosophical tradition. Although the Indian commitment (...) to pre-existence and rebirth precludes the arising of the Non-Identity Problem, this does not mean that there is not still a problem about justifying our obligations to future generations. The Indian Non-Reductionists about personal identity have difficulties with this that are comparable to the difficulties of their Western counterparts, but the Indian Buddhist Reductionists offer some provocative arguments for impartiality and the rationality of altruism. (shrink)

The use of cost-benefit analysis (CBA) in environmental decision-making and the contingent valuation (CV) technique as input into traditional CBA to elicit environmental values in monetary terms has stimulated an extensive debate. Critics have questioned the appropriateness of both the method and the technique. Some alternative suggestions for the elicitation of environmental values are based on a social process of deliberation. However, just like traditional economic theory, these alternative approaches may be questioned on their implicit value judgements regarding the legitimacy (...) of the social-political organisation of the process of value elicitation. Instead of making assumptions a priori, research efforts should be focused on the processes by which actual public attitudes and preferences towards the environment can best be elicited and fed into environmental or other public policy decision-making. In the study presented in this paper, support was found for both the individual WTP based approach and a participatory social deliberation approach to inform the environmental decision-making process, suggesting that a combination of both approaches is most appropriate. (shrink)

Self-regulation refers to the self's ability to control its own thoughts, emotions, and actions. Through self-regulation, we consciously control how much we eat, whether we give in to impulse, task performance, obsessive thoughts, and even the extent to which we allow ourselves recognition of our emotions. This work provides a synthesis and overview of recent and long-standing research findings of what is known of the successes and failures of self-regulation. People the world over suffer from the inability to control their (...) finances, their weight, their emotions, their craving for drugs, their sexual impulses, and more. The United States in particular is regarded by some observers as a society addicted to addiction. Therapy and support groups have proliferated not only for alcoholics and drug abusers but for all kinds of impulse control, from gambling to eating chocolate. Common to all of these disorders is a failure of self-regulation, otherwise known as "self-control." The consequences of these self-control problems go beyond individuals to affect family members and society at large. In Losing Control, the authors provide a single reference source with comprehensive information on general patterns of self-regulation failure across contexts, research findings on specific self-control disorders, and commentary on the clinical and social aspects of self-regulation failure. Self-control is discussed in relation to what the "self" is, and the cognitive, motivational, and emotional factors that impinge on one's ability to control one's "self." Discusses the importance of the concept of self-regulation to general issues of autonomy and identity Encompasses self-control of thoughts, feelings, and actions Contains a special section on the control of impulses and appetites First book to integrate recent research into a broad overview of the area. (shrink)

Why does American law allow the recreational use of some drugs, such as alcohol, tobacco, and caffeine, but not others, such as marijuana, cocaine, and heroin? The answer lies not simply in the harm the use of these drugs might cause, but in the perceived morality—or lack thereof—of their recreational use. Despite strong rhetoric from moral critics of recreational drug use, however, it is surprisingly difficult to discern the reasons they have for deeming the recreational use of (some) drugs morally (...) wrong. In this book, Rob Lovering lays out and dissects various arguments for the immorality of using marijuana, cocaine, heroin, and other drugs recreationally. He contends that, by and large, these arguments do not succeed. Lovering's book represents one of the first works to systematically present, analyze, and critique arguments for the moral wrongness of recreational drug use. Given this, as well as the popularity of the morality-based defense of the United States' drug laws, this book is an important and timely contribution to the debate on the recreational use of drugs. (shrink)

Work on 'can' in Action Theory is dichotomized into two styles of analysis: (1) what I call the indeterministic analysis, whereby for x to be able to do A means that there is no obstacle to x's doing A, and (2) the hypothetical analysis, which asserts that x is able to do A if and only if x will do A if x tries (wants, wills, chooses, etc.). This paper explores the general hypothesis that 'can' is two-ways ambiguous, that a (...) sense of opportunity corresponds to (1) and a sense of ability to something after the pattern of (2), and that a general concept of 'can' of the kind often sought after by action theorists requires a certain kind of integration of both concepts into a unified definition. The two previous most well-worked-out attempts to lay out a program along these lines, those of Sellars and Chisholm, are analyzed in detail in the hope of smoothing out some of the technical differences to provide foundations for further work of this type. An attempt is made to integrate the program with some recent developments in the concept of ability in the social sciences. The applicability of this work to some very vexing and significant problems in the social sciences is suggested. (shrink)

In this paper, I try to make a bundle theory of objects consistentwith a temporal parts theory of object persistence. To that end,I propose that such bundles are made up of tropes includingthe co-instantiation relation.

Depuis 2006, trois enquêtes représentatives au niveau national ont évalué en Irlande la perception dans la population générale de trois droits inhérents à la Convention internationale des droits des personnes handicapées (CIDPH): accès aux écoles ordinaires, à la vie sexuelle et à la parentalité. Trois questions sont posées dans le présent document: les Irlandais considèrent-ils que les personnes ont les mêmes droits, quelles que soient leurs déficiences? Soutiennent-ils certains droits des personnes handicapées plus que d’autres? En 2017, comment la perception (...) des droits a-t-elle évolué en Irlande? Le public irlandais est plus favorable aux droits des personnes handicapées physiques et sensorielles qu’à ceux des personnes ayant des déficiences cognitives ou émotionnelles. Il est également plus sensible au droit à l’épanouissement sexuel qu’à celui de l’accès à l’école. En 2017, il apparaît que les perceptions des Irlandais relatives aux droits des personnes handicapées ont évolué favorablement, en particulier pour ceux des personnes souffrant de troubles de santé mentale. Un suivi de la perception du public à l’échelle nationale contribuerait à éclairer les efforts de plaidoyer et de sensibilisation nécessaires pour faire du public irlandais un allié dans la réalisation des objectifs de la Convention. (shrink)

This enjoyable book presents a potpourri of paradoxes with the purpose of showing how they connect to serious philosophical issues. The main paradoxes are Zeno's, the sorites, Newcomb's problem, the paradoxes of confirmation, the surprise examination, and the paradoxes of self-reference. A final chapter defends the assumption that contradictions are unacceptable and an appendix throws in sixteen minor paradoxes. Along the way, R. M. Sainsbury peppers the reader with helpful queries and provocative asides.

Some people believe more than others in free will, and researchers have both measured and manipulated those beliefs. Disbelief in free will has been shown to cause dishonest, selfish, aggressive, and conforming behavior, and to reduce helpfulness, learning from one’s misdeeds, thinking for oneself, recycling, expectations for occupational success, and actual quality of performance on the job. Belief in free will has been shown to have only modest or negligible correlations with other variables, indicating that it is a distinct trait. (...) Belief in free will has correlated positively with life satisfaction and finding life meaningful, with self‐efficacy and self‐control, with low levels of stress, and (though not entirely consistently) with internal locus of control. High belief in free will has been linked to a punitive attitude toward wrongdoers and lower forgiveness toward them. The belief seems to involve a sense of agency and expecting others to behave in morally responsible fashion. (shrink)

Complex organisms thwart the simple rectilinear causality paradigm of “necessary and sufficient,” with its experimental strategy of “knock down and overexpress.” This Essay organizes the eccentricities of biology into four categories that call for new mathematical approaches; recaps for the biologist the philosopher's recent refinements to the causation concept and the mathematician's computational tools that handle some but not all of the biological eccentricities; and describes overlooked insights that make causal properties of physical hierarchies such as emergence and downward causation (...) straightforward. Reviewing and extrapolating from similar situations in physics, it is suggested that new mathematical tools for causation analysis incorporating feedback, signal cancellation, nonlinear dependencies, physical hierarchies, and fixed constraints rather than instigative changes will reveal unconventional biological behaviors. These include “eigenisms,” organisms that are limited to quantized states; trajectories that steer a system such as an evolving species toward optimal states; and medical control via distributed “sheets” rather than single control points. (shrink)

The evidence for a panhuman, cognitively rooted, essence-based concept of basic natural kind and for certain prototypical phenomenal forms is increasingly compelling, but there remain doubts as to whether these two elements combine with a principle of taxonomy to form a unified, domain-specific theory in the way Atran claims. The appropriateness of the notion of meme can also be questioned, as can the assertion that humans are always grouped in ethnobiological classifications in unambiguous contrast to other animals.

The period from 1780 to 1850 witnessed an unprecedented explosion of philosophical creativity in the German territories. In the thinking of Kant, Schiller, Fichte, Hegel, and the Hegelian school, new theories of freedom and emancipation, new conceptions of culture, society, and politics, arose in rapid succession. The members of the Hegelian school, forming around Hegel in Berlin and most active in the 1830’s and 1840’s, are often depicted as mere epigones, whose writings are at best of historical interest. In _Politics, (...) Religion, and Art: Hegelian Debates, _Douglas Moggach moves the discussion past the Cold War–era dogmas that viewed the Hegelians as proto-Marxists and establishes their importance as innovators in the fields of theology, aesthetics, and ethics and as creative contributors to foundational debates about modernity, state, and society. (shrink)

Research on social learning has identified mechanisms that learners use to decide from whom to learn. Several of these mechanisms indicate that learners prefer to learn from more competent people over less competent people. This requires learners to measure the competence of other people. We use this article to analyze the incentives that this measure of competence creates. Learners measure the competence of models, people they would consider learning from, and share these judgments with other learners. This gives each model (...) a reputation for competence within a community. Each model has a biological incentive to increase the magnitude of that reputation; at the very least, increasing the magnitude should make the model more attractive to potential mates. In this article, we present logic that indicates that one way for the model to increase the magnitude of that reputation is for the model to help people who think the model is competent. This reveals a novel evolutionary incentive for humans to help other humans. (shrink)

In this paper some lessons are learned regarding how to extend and deepen the theory of Macagno on assessing dialectical relevance by using the notion of argument distance. An argument is defined as dialectically relevant if it is an appropriate move in a multiagent dialogue exchange. Three examples are studied where a criticism of relevance is made against an argument, and the problem posed is how a response to this type of criticism should be judged to be justified or not, (...) based on the evidence. Based on these examples, an algorithm is presented that helps the user to determine argument distance in a given case as a means of helping to judge whether a criticism that an argument is not relevant is justified or not. (shrink)