Recent instances of corporate misconduct and examples of blatant leader self-serving behavior have rekindled interest in leader personality traits as antecedents of negative leader behavior. The current research builds upon that work, and examines the relationship between leader psychopathy and leader self-serving behavior. Moreover, we investigate whether follower self-esteem affects the occurrence of self-serving behavior in leaders with psychopathic tendencies. We predict that self-serving behaviors by psychopathic leaders are more likely to occur in the interaction with followers low in self-esteem. (...) We first conducted an experimental study (N = 156), in which we manipulated follower self-esteem, measured leader psychopathy, and assessed their combined effect on leader self-serving behavior using an ultimatum game. We then conducted a multi-source field study (N = 124 leader-follower dyads) using questionnaires to assess leader psychopathy, follower self-esteem, and perceived leader self-serving behavior. Across both studies, we found that leader psychopathy was positively related to their self-serving behavior, but only when followers had low rather than high self-esteem. As expected, our studies showed that the degree to which (perceived) psychopathic traits of leaders are reflected in their behavior depends on the characteristics of their followers. Apparently, the behavioral expression of negative leader traits is not only a matter of the trait strength, but instead is the result of the interplay between leader and follower in a certain context. (shrink)

The progress towards mathematization or, in a broader context, towards an increased “objectivity” is one of the main trends in the development of biological systematics in the past century. It is commonplace to start the history of numerical taxonomy with the works of R. R. Sokal and P. H. A. Sneath that in the 1960s laid the foundations of this school of taxonomy. In this article, I discuss the earliest research program in this field, developed in the 1920s by the (...) Russian entomologist and biometrician Eugen (Evgeniy Sergeevich) Smirnov. The theoretical and methodological grounds of this program are considered based on the published works of Smirnov as well as some archival sources. The influence of Smirnov’s evolutionary (mechano-Lamarckian) convictions on the development of this project of “exact systematics” is analyzed as well as the author’s attempts to establish a novel concept of “mathematical essentialism” in animal taxonomy. The probable causes of the failure of Smirnov’s project are viewed from both externalist and internalist perspectives, including the opposition to the use of quantitative methods in biology by some of the Lysenkoist ideologists in the USSR. A brief comparison of Smirnov’s research program with that developed 40 years later by Sokal and Sneath is provided. (shrink)

The Bayesian maxim for rational learning could be described as conservative change from one probabilistic belief or credence function to another in response to newinformation. Roughly: ‘Hold fixed any credences that are not directly affected by the learning experience.’ This is precisely articulated for the case when we learn that some proposition that we had previously entertained is indeed true (the rule of conditionalisation). But can this conservative-change maxim be extended to revising one’s credences in response to entertaining propositions or (...) concepts of which one was previously unaware? The economists Karni and Vierø (2013, 2015) make a proposal in this spirit. Philosophers have adopted effectively the same rule: revision in response to growing awareness should not affect the relative probabilities of propositions in one’s ‘old’ epistemic state. The rule is compelling, but only under the assumptions that its advocates introduce. It is not a general requirement of rationality, or so we argue. We provide informal counterexamples. And we show that, when awareness grows, the boundary between one’s ‘old’ and ‘new’ epistemic commitments is blurred. Accordingly, there is no general notion of conservative change in this setting. (shrink)

Gareth Evans'' proposal, as amended by Steven Neale –that a definite pronoun with a quantifiedantecedent that does not bind it has the sense ofa definite description – has been challenged inthe singular case by appeal to counter-examplesinvolving failure of the uniqueness condition forthe legitimacy of a singular description. Thischallenge is here extended to the plural.Counter-examples are provided by cases in which aplural description `the Fs'' does not denote,despite the propriety of the use of `they'' or`them'' it is to replace, because (...) of failure ofcumulativeness. A noncumulative predicate isnot distributive, and conditions for thelegitimacy of `the Fs'' designed to accommodatenondistributive `Fs'' are given in the context ofa two sorted theory with generalized quantifiers.Failure of cumulativeness is not to be confusedwith failure of maximality as Neale and othersdefine it. If not all Fs are Gs, `The Fs are Gs''is false; but it does not follow that `the Fs'' isillegitimate; and if `Fs'' is distributive. it isso only if there are no Fs. These differencesgranted, I give a partial defense of theEvans–Neale proposal from deficiencies in analternative based on the views of P. T.Geach. (shrink)

In Section I, the purely conceptual issue as to whether animals other than human beings, all or some, may possess rights is examined. This is approached via a consideration of the concept of a moral right, and by way of examining the claims of sentience, consciousness, capacities for pleasure and pain, having desires, possessing interests, self-consciousness, rationality in various senses. It is argued that only beings possessed actually or potentially of the capacity to be morally self-determining can be possessors of (...) rights. In Section II, normative questions concerning the rights animals might possess if they were to be capable of possessing rights are discussed. The approach followed is that of considering the kinds of argument advanced in support of human rights, and whether these arguments, and the rights they are claimed to establish, are transferable to animals, and whether there are or might be specifically animal rights. In Section III the question of what is or could be the goal of one who recognizes and seeks to respect all rights, animal and human, is raised. In particular, the issue as to whether a goal of maximizing the satisfaction of rights could remain a coherent one if animal rights are acknowledged, is explored. (shrink)

The dominant approach to environmental policy endorsed by conservative and libertarian policy thinkers, so-called “free market environmentalism”, is grounded in the recognition and protection of property rights in environmental resources. Despite this normative commitment to property rights, most self-described FME advocates adopt a utilitarian, welfare-maximization approach to climate change policy, arguing that the costs of mitigation measures could outweigh the costs of climate change itself. Yet even if anthropogenic climate change is decidedly less than catastrophic, human-induced climate change is likely (...) to contribute to environmental changes that violate traditional conceptions of property rights. Viewed globally, the actions of some countries—primarily industrialized nations—are likely to increase environmental harms suffered by other countries—less developed nations that have not made any significant contribution to climate change. It may well be that aggregate human welfare would be maximized in a warmer, wealthier world, or that the gains from climate change will offset environmental losses. Yet such claims, even if demonstrated, would not address the normative concern that the consequences of anthropogenic global warming would infringe upon the rights of people in less-developed nations. As a consequence, this paper calls for a rethinking of FME approaches to climate change policy. (shrink)

In this field questions arise which are certainly difficult; but as I listened last time to members of the group, I felt that the main difficulty perhaps lay in determining precisely what questions we are trying to answer. I have the conviction that if we could only say clearly what the questions are, the answers to them might not appear so elusive. So I have begun with a simple list of questions about discretion which in one form or another were, (...) as it seemed to me, expressed by the group last time. I may indeed have omitted something and inserted something useless: if so, no doubt I shall be informed of this later. The central questions then seem to me to be the following: 1. What is discretion, or what is the exercise of discretion? 2. Under what conditions and why do we in fact accept or tolerate discretion in a legal system? 3. Must we accept discretion or tolerate discretion, and if so, why? 4. What values does the use of discretion menace, and what values does it maintain or promote? 5. What can be done to maximize the beneficial operation of the use of discretion and to minimize any harm that it does? (shrink)

Can mystics intuit something of what modern physicists calculate? And if so, how? The question of the relation between the classical mysticisms and modern science is approached in Part I in terms of the multiple forms and definitions of 'truth value'. Intuition/epiphany, pragmatism, coherence, and correspondence are considered as forms of truth that have also been proposed for unitive mystical experience. Since 'correspondence' or 'representation' has been the definition at the core of modern science, it in particular is approached by (...) combining Lakoff and Johnson on the roots of all abstract knowledge in physical metaphor and Gibson on the ecological array of perception as the template from which such metaphors must be drawn. A series of similarities between the maximally inclusive metaphors underlying unitive mystical experience and cosmological physics, as abstracted from an ecological array already resonant with multiple levels of physical reality, suggests a basis for the correspondence between these otherwise distinct cognitive domains. Part II extends this approach to widely posited cross cultural values of spiritual or mystical realization, in terms of gratitude, compassion, faith, and inner freedom. When fully embodied as forms of personal conduct, these are also ultimately derivable from the openness and flow patternings of the ecological array itself. The possibility that the more abstract spiritual values of the major world mysticisms exemplify not only revelatory and pragmatic forms of truth, but are also broadly correspondent with both the principles of immediate concrete perception and modern physics, may eventually allow a contemporary re- formulation of the microcosm-macrocosm unities basic to traditional cultures. (shrink)

One of the central topics in semantic theory over the last few decades concerns the nature of local contexts. Recently, theorists have tried to develop general, non-stipulative accounts of local contexts (Schlenker, 2009; Ingason, 2016; Mandelkern & Romoli, 2017a). In this paper, we contribute to this literature by drawing attention to the local contexts of subclausal expressions. More specifically, we focus on the local contexts of quantificational determiners, e.g. `all', `both', etc. Our central tool for probing the local contexts of (...) subclausal elements is the principle Maximize Presupposition! (Percus, 2006; Singh, 2011). The empirical basis of our investigation concerns some data discussed by Anvari (2018b), e.g. the fact that sentences such as `All of the two presidential candidates are crooked' are unacceptable. In order to explain this, we suggest that the local context of determiners needs to contain the information carried by their restrictor. However, no existing non-stipulative account predicts this. Consequently, we think that the local contexts of subclausal expressions will likely have to be stipulated. This result has important consequences for debates in semantics and pragmatics, e.g. those around the so-called "explanatory problem" for dynamic semantics (Soames, 1982; Heim, 1990; Schlenker, 2009). (shrink)

Although informed consent is important in clinical research, questions persist regarding when it is necessary, what it requires, and how it should be obtained. The standard view in research ethics is that the function of informed consent is to respect individual autonomy. However, consent processes are multidimensional and serve other ethical functions as well. These functions deserve particular attention when barriers to consent exist. We argue that consent serves seven ethically important and conceptually distinct functions. The first four functions pertain (...) principally to individual participants: (1) providing transparency; (2) allowing control and authorization; (3) promoting concordance with participants' values; and (4) protecting and promoting welfare interests. Three other functions are systemic or policy focused: (5) promoting trust; (6) satisfying regulatory requirements; and (7) promoting integrity in research. Reframing consent around these functions can guide approaches to consent that are context sensitive and that maximize achievable goals. (shrink)

Gareth Evans' proposal, as amended by Steven Neale –that a definite pronoun with a quantifiedantecedent that does not bind it has the sense ofa definite description – has been challenged inthe singular case by appeal to counter-examplesinvolving failure of the uniqueness condition forthe legitimacy of a singular description. Thischallenge is here extended to the plural.Counter-examples are provided by cases in which aplural description `the Fs' does not denote,despite the propriety of the use of `they' or`them' it is to replace, because (...) of failure ofcumulativeness. A noncumulative predicate isnot distributive, and conditions for thelegitimacy of `the Fs' designed to accommodatenondistributive `Fs' are given in the context ofa two sorted theory with generalized quantifiers.Failure of cumulativeness is not to be confusedwith failure of maximality as Neale and othersdefine it. If not all Fs are Gs, `The Fs are Gs'is false; but it does not follow that `the Fs' isillegitimate; and if `Fs' is distributive. it isso only if there are no Fs. These differencesgranted, I give a partial defense of theEvans–Neale proposal from deficiencies in analternative based on the views of P. T.Geach. (shrink)

In this paper I hope to show that a particular modern approach to Aristotle's philosophy of mind is untenable and, out of that negative discussion, develop some tentative suggestions concerning the interpretation of two famous and puzzling Aristotelian maxims. These maxims are, first, that the soul is the form of the body and, second, that perception is the reception of form without matter. The fashionable interpretation of Aristotle which I wish to criticize is the attempt to assimilate him to certain (...) modern philosophies of mind by making him into a functionalist. I shall therefore begin by explaining this modern term of art. (shrink)

[p. 45] I wish to represent a certain subclass of nonconventional implicatures, which I shall call CONVERSATIONAL implicatures, as being essentially connected with certain general features of discourse; so my next step is to try to say what these features are. The following may provide a first approximation to a general principle. Our talk exchanges do not normally consist of a succession of disconnected remarks, and would not be rational if they did. They are characteristically, to some degree at least, (...) cooperative efforts; and each participant recognizes in them, to some extent, a common purpose or set of purposes, or at least a mutually accepted direction. This purpose or direction may be fixed from the start (e.g., by an initial proposal of a question for discussion), or it may evolve during the exchange; it may be fairly definite, or it may be so indefinite as to leave very considerable latitude to the participants (as in a casual conversation). But at each stage, SOME possible conversational moves would be excluded as conversationally unsuitable. We might then formulate a rough general principle which participants will be expected (ceteris paribus) to observe, namely: Make your conversational contribution such as is required, at the stage at which it occurs, by the accepted purpose or direction of the talk exchange in which you are engaged. One might label this the COOPERATIVE PRINCIPLE. On the assumption that some such general principle as this is acceptable, one may perhaps distinguish four categories under one or another of which will fall certain more specific maxims and submaxims, the following of which will, in general, yield results in accordance with the Cooperative Principle. Echoing Kant, I call these categories Quantity, Quality, Relation, and Manner. The category of QUANTITY relates to the quantity of information to be provided, and under it fall the following maxims. (shrink)

Quantum state targeting is a quantum game which results from combining traditional quantum state estimation with additional classical information. We consider a particular version of the game and show how it can be played with maximally entangled states. The optimal solution of the game is used to derive a Bell inequality for two entangled qutrits. We argue that the nice properties of the inequality are direct consequences of the method of construction.

In this paper I hope to show that a particular modern approach to Aristotle's philosophy of mind is untenable and, out of that negative discussion, develop some tentative suggestions concerning the interpretation of two famous and puzzling Aristotelian maxims. These maxims are, first, that the soul is the form of the body and, second, that perception is the reception of form without matter. The fashionable interpretation of Aristotle which I wish to criticize is the attempt to assimilate him to certain (...) modern philosophies of mind by making him into a functionalist. I shall therefore begin by explaining this modern term of art. (shrink)

Heyman's model, paradoxically, predicts that whereas a maximizing approach to drug choice will prevent escalation of drug use it will never yield complete abstinence. We suggest an alternative model that overcomes this difficulty by focusing on changes in drug tolerance. A small modification allows maximization to predict either abstinence or moderation (e.g., social drinking).

Life's Values offers new analyses of the nature of pleasure, happiness, well-being, and meaning in life. Recognizing how individuals have different priorities, Goldman explains what is of ultimate value in our lives and argues that making our desires rational - relevantly informed of what it's like to satisfy them - maximizes well-being.

Advances in transplantation have extended the life and relieved the suffering of thousands of individuals. The prospect of being able to use tissues from embryos, as well as from anencephalic newborns, offers the promise of further relief of suffering. However, these possibilities raise significant moral and public policy issues. The question arises of the extent to which those who disapprove of abortion may make use of tissues derived from abortion in order to treat serious diseases. This essay argues that, with (...) proper safeguards, such tissue can be used without cooperating in abortion. That is, even those who oppose abortion can benefit from the use of tissue procured during abortion. Questions also arise regarding the probity of maintaining a pregnancy in order to produce an anencephalic newborn whose biological existence will be maintained so as better to secure organs once death is declared. It is argued that, since no harm can be done to a being that has neither a sense of self or the capacity to feel pain, and since women have a right to forego abortions, there is no legitimate ground for opposing women's seeking meaning in their pregnancy through maximizing the opportunity of others to use the organs of their anencephalic newborn once death has been declared. Finally, it is argued that, since the capacities for sentience, a minimal condition for personhood, are never realized by an anencephalic, the entity has never been alive as a person. Therefore, there should be no opposition in principle to aborting anencephalics nor, after proper declaration, to making their organs available as one would after whole-brain death, despite the continued functioning of the brain stem. (shrink)

In recent years, the genetic testing and selection of IVF embryos, known as preimplantation genetic testing (PGT), has gained much traction in clinical assisted reproduction for preventing transmission of genetic defects. However, a more recent ethically and morally controversial development in PGT is its possible use in selecting IVF embryos for optimal intelligence quotient (IQ) and other non–disease-related socially desirable traits, such as tallness, fair complexion, athletic ability, and eye and hair colour, based on polygenic risk scores (PRS), in what (...) is referred to as PGT-P. Artificial intelligence (AI) and machine learning–based analysis of big data sets collated from genome sequencing of specific human ethnic populations can be used to estimate an individual embryo’s likelihood of developing such multifactorial traits by analysing the combination of specific genetic variants within its genome. Superficially, this technique appears compliant with Islamic principles and ethics. Because there is no modification of the human genome, there is no tampering with Allah’s creation (_taghyīr khalq Allah_). Nevertheless, a more critical analysis based on the five maxims of Islamic jurisprudence (_qawa'id fiqhiyyah_) that are often utilized in discourses on Islamic bioethics, namely _qaṣd_ (intention), _yaqın̄_ (certainty), _ḍarar_ (injury), _ḍarūra_ (necessity), and _`urf_ (custom), would instead reveal some major ethical and moral flaws of this new medical technology in the selection of non–disease-related socially desirable traits, and its non-compliance with the spirit and essence of Islamic law (shariah). Muslim scholars, jurists, doctors, and biomedical scientists should debate this further and issue a fatwa on this new medical technology platform. (shrink)

Scholars have long debated the appropriate balance between efficiency and redistribution. But recently, a wave of critics has argued not only that efficiency is less important, but that efficiency analysis itself is fundamentally flawed. Some say that efficiency is incoherent because there is no neutral baseline from which to judge inefficiency. Others say that efficiency is biased toward those best able to pay (generally, the rich). This essay contends that efficiency is not meaningfully incoherent or biased. The most widely discussed (...) forms of efficiency do not require any particular baseline, and even those that do require a baseline can still serve as useful approximations of more theoretically sound but computationally demanding measures. Moreover, arguments of bias do not account for the source of funds in public projects, produce unintuitive results, and draw an arbitrary cutoff between bias and non-bias that elides important distributional details. Ultimately, the tradeoff between efficiency and redistribution remains the most useful frame for policy debate. (shrink)

This paper provides a new approach to inference to the best explanation based on a new coherence measure for comparing how well hypotheses explain the evidence. It addresses a number of criticisms of the use of probabilistic measures in this context by Clark Glymour, including limitations of earlier work on IBE. Computer experiments are used to show that the new approach finds the truth with a high degree of accuracy in hypothesis selection tasks and that in some cases its accuracy (...) is greater than hypothesis selection based on maximizing posterior probability. Hence, by overcoming some of the problems with the previous approach, this work provides a more adequate defence of IBE and suggests that IBE not only tracks truth but also has practical advantages over the previous approach. Applications of the new approach to parameter estimation and model selection are also explored. (shrink)

This paper examines the strengths and weaknesses of one of science's most pervasive and flexible metaprinciples;optimalityis used to explain utility maximization in economics, least effort principles in physics, entropy in chemistry, and survival of the fittest in biology. Fermat's principle of least time involves both teleological and causal considerations, two distinct modes of explanation resting on poorly understood psychological primitives. The rationality heuristic in economics provides an example from social science of the potential biases arising from the extreme flexibility of (...) optimality considerations, including selective search for confirming vidence, ex post rationalization, and the confusion of prediction with explanation. Commentators are asked to reflect on the extent to which optimality is an organizing principle of nature, a set of relatively unconnected techniques of science, a normative principle for rational choice and social organization, a metaphysical way of looking at the world, or something else still. (shrink)

In their article, ‘That is not dead which can eternal lie: the aestivation hypothesis for resolving Fermi’s paradox’, Sandberg et al. try to explain the Fermi paradox by claiming that Landauer’s principle implies that a civilization can in principle perform far more times more) irreversible logical operations if it conserves its resources until the distant future when the cosmic background temperature is very low. So perhaps aliens are out there, but quietly waiting. Sandberg et al. implicitly assume, however, that computer-generated (...) entropy can only be disposed of by transferring it to the cosmological background. In fact, while this assumption may apply in the distant future, our universe today contains vast reservoirs and other physical systems in non-maximal entropy states, and computer-generated entropy can be transferred to them at the adiabatic conversion rate of one bit of negentropy to erase one bit of error. This can be done at any time, and is not improved by waiting for a low cosmic background temperature. Thus aliens need not wait to be active. As Sandberg et al. do not provide a concrete model of the effect they assert, we construct one and show where their informal argument goes wrong. (shrink)

The purpose of this paper is to provide a systematic defense of the single-case propensity account of probabilistic explanation from the criticisms advanced by Hanna and by Humphreys and to offer a critical appraisal of the aleatory conception advanced by Humphreys and of the deductive-nomological-probabilistic approach Railton has proposed. The principal conclusion supported by this analysis is that the Requirements of Maximal Specificity and of Strict Maximal Specificity afford the foundation for completely objective explanations of probabilistic explananda, so long as (...) they are employed on the basis of propensity criteria of explanatory relevance. (shrink)

Originally delivered at a conference of Marxist philosophers in China, this article examines some links, and some tensions, between business ethics and the traditional concerns of Marxism. After discussing the emergence of business ethics as an academic discipline, it explores and attempts to answer two Marxist objections that might be brought against the enterprise of business ethics. The first is that business ethics is impossible because capitalism itself tends to produce greedy, overreaching, and unethical business behavior. The second is that (...) business ethics is irrelevant because focusing on the moral or immoral conduct of individual firms or businesspeople distracts one’s attention from the systemic vices of capitalism. I argue, to the contrary, that, far from being impossible, business requires and indeed presupposes ethics and that for those who share Marx’s hope for a better society, nothing could be more relevant than engaging the debate over corporate social responsibility. In line with this, the article concludes by sketching some considerations favoring corporations’ adopting a broader view of their social and moral responsibilities, one that encompasses more than the pursuit of profit. (shrink)

Hilbert’s unpublished 1917 lectures on logic, analyzed here, are the beginning of modern metalogic. In them he proved the consistency and Post-completeness (maximal consistency) of propositional logic -results traditionally credited to Bernays (1918) and Post (1921). These lectures contain the first formal treatment of first-order logic and form the core of Hilbert’s famous 1928 book with Ackermann. What Bernays, influenced by those lectures, did in 1918 was to change the emphasis from the consistency and Post-completeness of a logic to its (...) soundness and completeness: a sentence is provable if and only if valid. By 1917, strongly influenced by PM, Hilbert accepted the theory of types and logicism -a surprising shift. But by 1922 he abandoned the axiom of reducibility and then drew back from logicism, returning to his 1905 approach of trying to prove the consistency of number theory syntactically. (shrink)

Robert Nozick argued that we would not plug into his machine that could give us any experiences we chose. More recently Richard Kraut has argued that it would be prudentially rational to plug into the machine, since only experiences count for personal welfare. I argue that both are wrong, that either choice can be rational or not, depending on the central desires of the subjects choosing. This claim is supported by the empirical evidence, which shows an almost even split between (...) those who would enter and those who would not. If we interpret those on both sides as making rational choices to maximize their personal well-being, and if such rational choice tends to enhance well-being, then the experience machine thought experiment supports neither experientialism nor its denial, but instead a rational desire satisfaction account of personal well-being. Unlike objective list and perfectionist accounts, the desire satisfaction account of well-being easily accommodates rational choices on both sides, depending on the motivational sets of the choosers. (shrink)

Contemporary national codes of ethics hinge more on fantasy than fact: the idea that journalists control what becomes news. While journalists' influence over news has grown during much of the 20th century to the point where courts have begun to define them as professionals, it has never surpassed the influence of owners. New evidence indicates authority has eroded as media firms seek to maximize return to investors. As journalists' autonomy recedes, national ethics codes become less relevant to practitioners and more (...) publicly deceptive. The codes also are unethical themselves as journalists become decision takers rather than decision makers. Moral responsibility and real world authority diverge. It2 time to end the charade by creating new codes that include the decision makers outside the news room. (shrink)

I argue that Islam provides very efficient ethical principles for dealing with the present ecological crisis, a crisis rooted in moral deprivation. I reject the maximization of benefits from natural resources without giving due consideration to the adverse environmental impact of such actions, and argue that this practice is based on injustices generated by factors like greed, extravagance, and ignorance, among others. So far, Western solutions of such problems have generally been based purely on materialistic approaches which place emphasis on (...) secular technological models without any linkage with metaphysical doctrines. Islam recognizes that man by virtue of his creation is a superior being, one for the service of whom the Earth was created; but at the same time man has been made responsible for any departure inhis behavior from the ways laid down by Almighty Allah. Man’s activities, according to Islam, must be based on the idea that this world is a transitory abode, and that man has to gain God’s favor in order to be able to find a better place in the other world. Hence, man's actions, as manifestations of his faith, must be properly and effectively administered, requiring justice, Taqwa, and appropriate knowledge and understanding of environmental problems. (shrink)

In this article it is pointed out what kind of rules for communication and argumentation are required in order to make it possible to resolve disputes in an orderly way. In section 2, Gricean maxims and Searlean speech act conditions are integrated in such a way that five general rules for communication can be formulated. In section 3, starting from Lewis's definition of convention, it is argued that the interactional effect of accepting is conventionally linked with the complex communicative act (...) complex of argumentation. In section 4, the rules for argumentation are placed in a dialogical perspective. (shrink)