(2013). Rational argument, rational inference. Argument & Computation: Vol. 4, Formal Models of Reasoning in Cognitive Psychology, pp. 21-35. doi: 10.1080/19462166.2012.689327.

Common sense arguments are practically always about incomplete and uncertain information. We distinguish two aspects or kinds of uncertainty. The one is defined as a persons’ uncertainty about the truth of a sentence. The other uncertainty is defined as a persons’ uncertainty of his assessment of the truth of a sentence. In everyday life argumentation we are often faced with both kinds of uncertainty which should be distinguished to avoid misunderstandings among discussants. The paper presents a probabilistic account of (...) both kinds of uncertainty in the framework of coherence. Furthermore, intuitions about the evaluation of the strength of arguments are explored. Both reasoning about uncertainty and the development of a theory of argument strength are central for a realistic theory of rational argumentation. (shrink)

Review of Jonathan Powell , Logos: Rational Argument in Classical Rhetoric, BICS supplement 96, London, 2007.

One of the central tasks of a theory of argumentation is to supply a theory of appraisal: a set of standards and norms according to which argumentation, and the reasoning involved in it, is properly evaluated. In their most general form, these can be understood as rational norms, where the core idea of rationality is that we rightly respond to reasons by according the credence we attach to our doxastic and conversational commitments with the probative strength of (...) the reasons we have for them. Certain kinds of rational failings are so because they are manifestly illogical – for example, maintaining overtly contradictory commitments, violating deductive closure by refusing to accept the logical consequences of one’s present commitments, or failing to track basing relations by not updating one’s commitments in view of new, defeating information. Yet, according to the internal and empirical critiques, logic and probability theory fail to supply a fit set of norms for human reasoning and argument. Particularly, theories of bounded rationality have put pressure on argumentation theory to lower the normative standards of rationality for reasoners and arguers on the grounds that we are bounded, finite, and fallible agents incapable of meeting idealized standards. This paper explores the idea that argumentation, as a set of practices, together with the procedures and technologies of argumentation theory, is able to extend cognition such that we are better able to meet these idealized logical standards, thereby extending our responsibilities to adhere to idealized rational norms. (shrink)

The structure of this discussion will be tripartite. First it will set out a way of distinguishing between rhetoric and strictly rational argumentation. Next it will consider some of the ramifications of this proposed way of looking at the matter – in particular what its implications are for rationality and for rhetoric, respectively. Finally it examines how this perspective bears on the project of philosophizing. The paper's ultimate aim, accordingly, is to consider what light such an analysis can (...) shed upon philosophy and philosophizing. (shrink)

This essay attempts to investigate the prospects for a certain model of rational argumentation, what we call a dialectical model. More specifically, we assess the utility of this model for the purposes of inquiry. Dialectical inquiry consists in a rule-governed discussion between two or more interlocutors in which the acceptability of a claim is determined by laying out and criticizing the support available for it. Models of dialectical argumentative discussion have been proposed before, and part of this work (...) consists in a critical outline of three relatively recent models, those of Rescher, Toulmin, and van Eemeren and Grootendorst. The remainder of the essay evaluates and defends a set of standards of dialectical adequacy. We defend cogency standards of acceptability, relevance, and sufficiency and pragmatic standards embodied in a set of rules of discussion. The impetus of the work is a desire to have a model through which we may rationally assess the acceptability of claims.Dept. of Philosophy. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1990.J674. Source: Masterss International, Volume: 30-03, page: 0419. Thesis --University of Windsor, 1990. (shrink)

William AIston has argued that the prospects are dim for demonstrating with out epistemic circularity that any of our fundamental doxastic practices are reliable. In response to this predicament, he supplies a pragmatic rationale for our continued engagement in these practices. I argue that either he relativizes the practical rationality of engaging in a doxastic practice to participants, which ill suits his aim of providing a realist account of the practice that provides nonparticipants with are as on to trust that (...) the practice is reliable, or he provides participants with no reason to trust their own practice in the face of actual or possible rival practices that issue in incompatible beliefs, unless they take as such a reason the bare fact that this practice is the one they happen to have. This too does not accord well with the need to provide an account of our practices that provides room for critical scrutiny of them. (shrink)

William AIston has argued that the prospects are dim for demonstrating with out epistemic circularity that any of our fundamental doxastic practices are reliable. In response to this predicament, he supplies a pragmatic rationale for our continued engagement in these practices. I argue that either he relativizes the practical rationality of engaging in a doxastic practice to participants, which ill suits his aim of providing a realist account of the practice that provides nonparticipants with are as on to trust that (...) the practice is reliable, or he provides participants with no reason to trust their own practice in the face of actual or possible rival practices that issue in incompatible beliefs, unless they take as such a reason the bare fact that this practice is the one they happen to have. This too does not accord well with the need to provide an account of our practices that provides room for critical scrutiny of them. (shrink)

The theory of rhetoric is recognised and widely used in a number of disciplines, particularly in the social sciences. It is therefore slightly surprising that it has not gained an important footing in jurisprudence. It is often argued that rhetoric and argumentative justification are clearly different issues. However, the present paper argues that they are in fact two aspects of argumentation and that the theory of rhetoric may be used also in the context of legal reasoning.

It is unclear how an argumentative environment would select for better reasoning given three general findings. First, argument rationality typically fails to persuade poor reasoners. Second, reasoned argumentation competes with more persuasive and less rational arguments for limited cognitive resources. Third, those poor at reasoning fail to distinguish between valid and invalid arguments. Reasoning, therefore, is poorly designed for argument.

According to conciliatory views on the significance of disagreement, it’s rational for you to become less confident in your take on an issue in case your epistemic peer’s take on it is different. These views are intuitively appealing, but they also face a powerful objection: in scenarios that involve disagreements over their own correctness, conciliatory views appear to self-defeat and, thereby, issue inconsistent recommendations. This paper provides a response to this objection. Drawing on the work from defeasible logics paradigm (...) and abstract argumentation, it develops a formal model of conciliatory reasoning and explores its behavior in the troubling scenarios. The model suggests that the recommendations that conciliatory views issue in such scenarios are perfectly reasonable—even if outwardly they may look odd. (shrink)

This book demonstrates how an interest in political argument leads naturally to a philosophical way of thinking. It analyses both practising politicans and political theorists and is a much needed introudction to two vitally important, and independent, disciplines.

This paper provides a thorough analysis of two often informally stated claims. First, successful argumentation in the sense of persuasive argumentation requires agreement between the interlocutors about the rationality of arguments. Second, a general agreement about rationality of arguments cannot itself be established via argumentation, since such an attempt leads to an infinite meta‐regress. Hence, agreement about the rationality of arguments is a precondition for successful argumentation. As the paper argues, these plausible claims hold under the (...) assumption that interlocutors are subjectively rational and follow their own standards of rationality when engaging in argumentation. (shrink)

How can free and equal people cooperate to solve conflicts and common problems in a rational and legitimate way? In this article I deduce principles for doing so from the requirements of rational communication set out in the discourse theory of Jürgen Habermas. I apply them in defining a process of efficient decision making. What I call ‘communicative design’ denotes the design of a reason giving process in which the practice of proposing and assessing claims with regard to (...) rulemaking and problem solving is undertaken on an equal and autonomous basis. Two sets of prescriptions are given: organisational principles for the composition of groups and argumentative principles for deliberation. However, any procedure aimed at achieving a rational consensus in decision making in organisations has to deal in practice with limitations of time, participation and the information available. Communicative design may not guarantee strictly rational decisions, then, but the procedure it constructs does promise relatively ‘more valid’ decisions than might be expected if another procedure had been adopted. (shrink)

Recent work in artificial intelligence has increasingly turned to argumentation as a rich, interdisciplinary area of research that can provide new methods related to evidence and reasoning in the area of law. Douglas Walton provides an introduction to basic concepts, tools and methods in argumentation theory and artificial intelligence as applied to the analysis and evaluation of witness testimony. He shows how witness testimony is by its nature inherently fallible and sometimes subject to disastrous failures. At the same (...) time such testimony can provide evidence that is not only necessary but inherently reasonable for logically guiding legal experts to accept or reject a claim. Walton shows how to overcome the traditional disdain for witness testimony as a type of evidence shown by logical positivists, and the views of trial sceptics who doubt that trial rules deal with witness testimony in a way that yields a rational decision-making process. (shrink)

Most dialectical models view argumentation as a process of critically testing a standpoint. Further, they assume that what we critically test can be analytically reduced to individual and bi-polar standpoints. I argue that these two assumptions lead to the dominant view of dialectics as a bi-partisan argumentative discussion in which the yes-side argues against the doubter or the no-side. I scrutinise this binary orientation in understanding argumentation by drawing on the main tenets of normative pragmatic and pragma-dialectical theories (...) of argumentation. I develop my argument by showing how argumentative practice challenges these assumptions. I then lay out theoretical reasons for this challenge. This paves the way for an enhanced conceptualisation of dialectical models and their standards of rationality in terms of multi-party discussions, or argumentative polylogues. (shrink)

The tu quoque argument is the argument that since in the end rationalism rests on an irrational choice of and commitment to rationality, rationalism is as irrational as any other commitment. Popper's and Polanyi's philosophies of science both accept the argument, and have on that account many similarities; yet Popper manages to remain a rationalist whereas Polanyi decided for an irrationalist version of rationalism. This is more marked in works of their respective followers, W. W. Bartley III and Thomas S. (...) Kuhn. Bartley declares the rationalist's very openness to criticism open to criticism, in the hope of rendering Popper's critical rationalism quite comprehensive. Kuhn makes rationality depend on the existence of an accepted model for scientific research (paradigm), thus rendering Polanyi's view of the authority of scientific leadership a sine qua non for scientific progress. The question raised here is, in what sense is a rationalist committed to his rationality, or an irrationalist to his specific axiom ? The tradition views only the life?long commitment as real. Viewing rationality as experimental open?mindedness, we may consider a rationalist unable to retreat into any life?long commitment ? even commitment to science. In this way the logic of the tu quoque argument is made irrelevant: anyone able to face the choice between rationality and commitment is already beyond such a choice; it is one thing to be still naïve and another ? and paradoxical ? thing to return to one's naïveté. (shrink)

Do Ideas exist and can we prove it ? Do proofs of their existence have all the same value or not ? Aristotle addresses these issues in two famous documents of the controversy that pitted supporters of the theory of Forms against its opponents within Plato’s Academy : his lost work, quoted by Alexander of Aphrodisias by the title of Peri Ideon, and the lengthy thrust against Ideas that can be read, with some minor variations, in books A, chapter 9, (...) and M, chapter 4, of his Metaphysics. As we only have fragments of the first, the second being laconic and little more than a summary, there has been much speculation about the exact number and nature of the arguments for and against the Forms. Since the pioneering works of Léon Robin, Paul Wilpert et Harold Cherniss, one problem in particular has attracted the attention of specialists : what arguments does Aristotle accuse of either producing Ideas on relatives for one or of dragging in the « Third Man » for another ? Why does he consider these arguments to be more rigorous than the others ? If we are not dealing with the same arguments, how can these be more or better argued than those mentioned by Aristotle in the same breath, namely the arguments Plato’s followers took from the sciences, the one over many and the thought about things that have perished ? Through detailed analysis of texts from the Corpus Aristotelicum and Alexander’s commentary on Aristotle’s Metaphysics, Rationes ex machina develops a new interpretation of the controversial file of the akribesteroi tôn logôn as well as a micrological solution to the puzzle that has come to be a sort of compulsory figure of the exegesis of the Aristotelian criticism of « Plato’s Ideas ». (shrink)

My focus is on pragmatic arguments for various rationality constraints on a decision maker’s state of mind: on his beliefs or preferences. An argument of this kind purports to show that a violator of a given constraint can be exposed to a decision problem in which she will act to her guaranteed disadvantage. Dramatically put, she can be exploited by a clever bookie who doesn’t know more than the agent himself. Examples of pragmatic arguments of this kind are synchronic Dutch (...) Books, for the standard probability axioms, diachronic Dutch Books, for the more controversial principles of reflection and conditionalization, and Money Pumps, for the transitivity requirement on preferences. It is suggested that the proposed exploitation set-ups share a common feature. If the violator of a given constraint is logically and mathematically competent, she can be exploited only if she is disunified in his decision-making, i.e., only if she makes decisions on various issues she confronts separately rather than jointly. In other words, exploitation is possible only if the decision problem has been framed in a certain way. Unification in decision making is relatively unproblematic in synchronic contexts, but it may be quite costly and inconvenient diachronically, especially when the issues under consideration are widely spread over time. On my view, therefore, pragmatic arguments should be seen as delivering conditional recommendations: If you want to afford disunification, then you’d better satisfy these constraints. The arguments of this kind fail to establish the inherent rationality of the constraints under consideration. Isaac Levis view of the status of pragmatic arguments is diametrically opposed to mine. According to him, only synchronic pragmatic arguments are valid. The diachronic ones, he argues, lack any validity at all. This line of reasoning is questioned in my paper. (shrink)

My focus is on pragmatic arguments for various rationality constraints on a decision maker’s state of mind: on his beliefs or preferences. An argument of this kind purports to show that a violator of a given constraint can be exposed to a decision problem in which she will act to her guaranteed disadvantage. Dramatically put, she can be exploited by a clever bookie who doesn’t know more than the agent himself. Examples of pragmatic arguments of this kind are synchronic Dutch (...) Books, for the standard probability axioms, diachronic Dutch Books, for the more controversial principles of reflection and conditionalization, and Money Pumps, for the transitivity requirement on preferences. It is suggested that the proposed exploitation set-ups share a common feature. If the violator of a given constraint is logically and mathematically competent, she can be exploited only if she is disunified in his decision-making, i.e., only if she makes decisions on various issues she confronts separately rather than jointly. In other words, exploitation is possible only if the decision problem has been framed in a certain way. Unification in decision making is relatively unproblematic in synchronic contexts, but it may be quite costly and inconvenient diachronically, especially when the issues under consideration are widely spread over time. On my view, therefore, pragmatic arguments should be seen as delivering conditional recommendations: If you want to afford disunification, then you’d better satisfy these constraints. The arguments of this kind fail to establish the inherent rationality of the constraints under consideration. Isaac Levis view of the status of pragmatic arguments is diametrically opposed to mine. According to him, only synchronic pragmatic arguments are valid. The diachronic ones, he argues, lack any validity at all. This line of reasoning is questioned in my paper. (shrink)

He further argues that it is necessary to rethink traditional conceptions of argument, and to find a position that avoids the limitations of both the highly abstract approach of formal logic and the highly contextualized approaches of rhetoric and communication theory.".

Chaïm Perelman resuscitated the rhetorical tradition by developing an elegant and detailed theory of argumentation. Rejecting the single-minded Cartesian focus on rational truth, Perelman recovered the ancient wisdom that we can argue reasonably about matters that admit only of probability. From this one would conclude that Perelman's argumentation theory is inalterably opposed to natural law, and therefore that I would have done better to have written an article titled "Perelman's Theory of Argumentation as a Rejection of (...) Natural Law."However, my thesis is precisely that Perelman's theory of argumentation connects to the natural law tradition in interesting and productive ways. Perelman referred to natural law in. (shrink)

The received picture of rationality, nowadays in trouble, is contrasted with the "argumentative" conception, inspired by Paul Grice's proposal to define rationality as an agent's desire that his or her moves are supported by reasons and a capacity to satisfy that desire at least to some extent. Some implications of the argumentative conception of rationality are unfolded: it involves a first-person perspective, requires criteria for the attribution of the capacity to justify one's moves, and allows for failures to behave or (...) think rationally. Attribution of argumentative rationality to a human being does not follow from final evidence, but , coincides with the acknowledgement of personhood, which in turn, being at least to some extent a matter of choice, is revealed to be an ethical task. So the argumentative conception of rationality may help us see why it still make sense to think of man as a rational being. (shrink)

This thesis justifies the need for and develops a new integrated model of practical reasoning and argumentation. After framing the work in terms of what is reasonable rather than what is rational (chapter 1), I apply the model for practical argumentation analysis and evaluation provided by Fairclough and Fairclough (2012) to a paradigm case of unreasonable individual practical argumentation provided by mass murderer Anders Behring Breivik (chapter 2). The application shows that by following the model, Breivik (...) is relatively easily able to conclude that his reasoning to mass murder is reasonable – which is understood to be an unacceptable result. Causes for the model to allow such a conclusion are identified as conceptual confusions ingrained in the model, a tension in how values function within the model, and a lack of creativity from Breivik. Distinguishing between dialectical and dialogical, reasoning and argumentation, for individual and multiple participants, chapter 3 addresses these conceptual confusions and helps lay the foundation for the design of a new integrated model for practical reasoning and argumentation (chapter 4). After laying out the theoretical aspects of the new model, it is then used to re-test Breivik’s reasoning in light of a developed discussion regarding the motivation for the new place and role of moral considerations (chapter 5). The application of the new model shows ways that Breivik could have been able to conclude that his practical argumentation was unreasonable and is thus argued to have improved upon the Fairclough and Fairclough model. It is acknowledged, however, that since the model cannot guarantee a reasonable conclusion, improving the critical creative capacity of the individual using it is also of paramount importance (chapter 6). The thesis concludes by discussing the contemporary importance of improving practical reasoning and by pointing to areas for further research (chapter 7). (shrink)

Aulis Aarnio addresses the question of how legal interpretations should be justified. Aarnio considers a justification to be rational only if the justification process has been conducted in a rational way, and if the final result of this process is acceptable to the legal community. According to Aarnio, a theory concerning the justification of legal interpretations should contain a procedural component specifying the conditions of rationality for legal discussions, and a substantial component specifying the material conditions of acceptability (...) for the final result. The procedural component of Aarnio’s theory formulates rules for the rationality of legal discussions. The substantial component specifies when the result of a legal interpretation can be called acceptable. Aarnio considers such a result acceptable if it is acceptable to a particular legal community in which there is consensus with respect to certain norms and values. (shrink)

In this paper, the author develops an instrument for the rational reconstruction of argumentation in which a judicial decision is justified by referring to the consequences in relation to the purpose of the rule. The instrument is developed by integrating insights from legal theory and legal philosophy about the function and use of arguments from consequences in relation to the purpose of a rule into a pragma-dialectical framework. Then, by applying the instrument to the analysis of examples from (...) legal practice, it is demonstrated that the instrument can offer a heuristic and critical tool for the analysis and evaluation of legal argumentation that can ‘bridge’ the gap between more abstract discussions of forms of legal argumentation on the one hand, and legal arguments as they occur in actual legal practice on the other hand. (shrink)

Most dialectical models view argumentation as a process of critically testing a standpoint. Further, they assume that what we critically test can be analytically reduced to individual and bi-polar standpoints. I argue that these two assumptions lead to the dominant view of dialectics as a bi-partisan argumentative discussion in which the yes-side argues against the doubter or the no-side. I scrutinise this binary orientation in understanding argumentation by drawing on the main tenets of normative pragmatic and pragma-dialectical theories (...) of argumentation. I develop my argument by showing how argumentative practice challenges these assumptions. I then lay out theoretical reasons for this challenge. This paves the way for an enhanced conceptualisation of dialectical models and their standards of rationality in terms of multi-party discussions, or argumentative polylogues. (shrink)

Can non-human animals think, or arc they mindless automatons? The question is an ancient one, but as we enter the new millennium its answer is of increasing importance to both ethics and the philosophy of mind. Donald Davidson is perhaps the best known contemporary proponent of the claim that animals cannot think. His argument is characteristically systematic and far-reaching. He claims that the capacity for surprise is a necessary condition for thought, and that such a capacity presupposes complex attitudes involving (...) sophisticated concepts and higher-order beliefs. He argues that only creatures with a fully developed language could reasonably be said to be capable of such attitudes, and as such, he concludes that humans are the only animals that can think. I argue against Davidson along both positive and negative dimensions. First, I develop a simple argument designed to show that we have good reason to believe that even with several important Davidsonian assumptions in place, animals can think. Second, I argue that Davidson has failed to provide plausible support for his assumption that the capacity to be surprised is anything other than a sufficient condition for thought. Finally, I suggest that we distinguish between thought and rationality in the hopes of better capturing the wide diversity of mental landscapes. (shrink)

I argue that argumentation is not to be identified with (attempted) rational persuasion, because although rational persuasion appears to consist of arguments, some uses of arguments are not attempts at rational persuasion. However, the use of arguments in argumentative communication to try to persuade is one kind of attempt at rational persuasion. What makes it rational is that its informing ideal is to persuade on the basis of adequate grounds, grounds that make it reasonable (...) and rational to accept the claim at issue. (shrink)

This paper explicates an account of argumentative rationality by articulating the common, basic idea of its nature, and then identifying a collection of assumptions inherent in it. Argumentative rationality is then contrasted with dual-process theories of reasoning and rationality prevalent in the psychology of reasoning. It is argued that argumentative rationality properly corresponds only with system-2 reasoning in dual-process theories. This result challenges the prescriptive force of argumentative norms derives if they derive at all from their descriptive accuracy of our (...) cognitive capacities. In response, I propose an activity-based account of reasoning which retains the assumptions of argumentative rationality while recontextualizing the relationship between reasoning as a justificatory activity and the psychological states and processes underlying that activity. (shrink)

The great Buddhist writer Santaraksita (725-88) was central to the Buddhist traditions spread into Tibet. He and his disciple Kamalasila were among the most influential thinkers in classical India. They debated ideas not only within the Buddhist tradition but also with exegetes of other Indian religions, and they both traveled and nurtured Buddhism in Tibet during its infancy there. Their views, however, have been notoriously hard to classify. The present volume examines Santaraksita's encyclopedic Tattvasamgraha and Kamalasila's detailed commentary on that (...) text in his Panjika, two works that have historically been presented together. The works cover all conceivable problems in Buddhist thought and portray Buddhism as a supremely rational faith. One hotly debated topic of their time was omniscience -- infinite, all-compassing knowledge -- whether it was possible and whether one could defensibly claim it as a quality of the Buddha. (shrink)

This article is a discussion of Ralph Johnson’s concept of practice of argumentation. Such practice is characterized by three properties: (1) It is teleological, (2) it is dialectical, and (3) it is manifestly rational. I argue that Johnson’s preferred definition of practice—which is Alasdair MacIntyre’s concept of practice as a human activity with internal goods accessible through partcipation in that same activity—does not fit these properties or features. I also suggest that this failure should not require Johnson to (...) adjust the properties to make them fit the practice concept. While MacIntyre’s concept of practice clearly has some attractive features, it does not provide what Johnson wants from a concept of practice. (shrink)

Robert Alexy develops his influential theory of legal reasoning exploring the nature of legal argumentation and its relation to practical reasoning. In doing so he sheds light on fundamental questions of law and rationality, which are as crucial to practising lawyers and law students as they are to scholars of legal theory.

Wittgenstein famously introduced the notion of ‘hinge propositions’: propositions that are assumptions or presuppositions of our languages, conceptual schemes, and language games, presuppositions that cannot themselves be rationally established, defended, or challenged. This idea has given rise to an epistemological approach, ‘hinge epistemology’, which itself has important implications for argumentation. In particular, it develops and provides support for Robert Fogelin’s case for deep disagreements: disagreements that cannot be rationally resolved by processes of rational argumentation. In this paper, (...) I first examine hinge epistemology in its own right, and then explore its implications for arguments and the theory of argumentation. I argue that the Wittgensteinian approach to hinge propositions is problematic, and that, suitably understood, they can be rationally challenged, defended, and evaluated; there are no well-formed, coherent propositions, ‘hinge’ or otherwise, that are beyond epistemic evaluation, critical scrutiny, and argumentative support/critique; and good arguments concerning hinge propositions are not only possible but common. My arguments will rely on a thoroughgoing fallibilism, a rejection of ‘privileged’ frameworks, and an insistence on the challengeability of all frameworks, both from within and from without. (shrink)

In this article, I present a new interpretation of the pro-life view on the status of early human embryos. In my understanding, this position is based not on presumptions about the ontological status of embryos and their developmental capabilities but on the specific criteria of rational decisions under uncertainty and on a cautious response to the ambiguous status of embryos. This view, which uses the decision theory model of moral reasoning, promises to reconcile the uncertainty about the ontological status (...) of embryos with the certainty about normative obligations. I will demonstrate that my interpretation of the pro-life view, although seeming to be stronger than the standard one, has limited scope and cannot be used to limit destructive research on human embryos. (shrink)

Computational models have shown how polarisation can rise among deliberating agents as they approximate epistemic rationality. This paper provides further support for the thesis that polarisation can rise under condition of epistemic rationality, but it does not depend on limitations that extant models rely on, such as memory restrictions or biased evaluation of other agents’ testimony. Instead, deliberation is modelled through agents’ purposeful introduction of arguments and their rational reactions to introductions of others. This process induces polarisation dynamics on (...) its own. A second result is that the effect size of polarisation dynamics correlates with particular types of argumentative behaviour. Polarisation effects can be soothed when agents take into account the opinions of others as premises, and they are amplified as agents fortify their own beliefs. These results underpin the relevance of argumentation as a factor in social-epistemic processes and indicate that rising issue polarisation is not a reliable indicator of epistemic shortcomings. (shrink)

In this paper, I’ll sketch an approach to epistemology that draws its inspiration from two aspects of Kant’s philosophical project. In particular, I want to explore how we might develop a Kantian conception of rationality that combines a virtue-theoretical perspective on the nature of rationality with a role for transcendental arguments in defining the demands this conception of rationality places upon us as thinkers. In discussing these connections, I’ll proceed as follows. First, I’ll describe the sorts of epistemological questions I’ll (...) be focusing on, and the framework within which I’ll try to address them. Then I’ll say a bit about the connections between this framework on Kant’s own views. Next, I’ll explain in more detail how the two main elements of this framework relate to one another by explaining how a certain sort of “transcendental argument” allows us to derive conclusions about the requirements of rationality from facts about the nature of rational capacities. Then, I’ll briefly illustrate these connections with two examples: the rationality of explanatory inference like inference to the best explanation and the rationality of perceptual belief. Finally, I’ll conclude by saying a bit about the relevance of this ideas for debates about the rationality of basic beliefs or prior probabilities. (shrink)

Robert Alexy develops his influential theory of legal reasoning exploring the nature of legal argumentation and its relation to practical reasoning. In doing so he sheds light on fundamental questions of law and rationality, which are as crucial to practising lawyers and law students as they are to scholars of legal theory.

In this paper I argue that resource allocation in publicly funded medical systems cannot be done using a purely substantive theory of justice, but must also involve procedural justice. I argue further that procedural justice requires institutions and that these must be “local” in a specific sense which I define. The argument rests on the informational constraints on any non-market method for allocating scarce resources among competing claims of need. However, I resist the identification of this normative account of local (...) justice with the actual approach to local decision-making taken within the UK National Health Service. I illustrate my argument with reference to the case of provision of In Vitro Fertilisation within the UK NHS. (shrink)

The following is a defense of Jurgen Habermas' argumentational consensual procedure against Keith Lehrer and Carl Wagner's weighted averaging consensual procedure (and, I tentatively claim, against any weighted averaging consensual procedure). The argument is twofold: if Lehrer and Wagner intend, implicity, to replace what is for Habermas the metatheoretical stage of a discussion with the aggregation of judgments of respect, then their procedure fails to make use of all available information and the participants are not committed to the weighted average (...) position on these grounds; if, on the other hand, they do not intend to replace metatheoretical discussion by aggregation, then the conditions under which the discussion could conceivably have come to a halt are such as to provide no support for the claim that it is rational to aggregate, rather than to consider the discussion unresolved until more information is available. (shrink)

In contrast to approaches to critical thinking which emphasize the importance of rules, strategies and criteria for the analysis and evaluation of arguments, this paper seeks to vindicate the central role which judgment plays in the assessment process. To counteract charges of arbitrariness or subjectivism in the exercise of judgment, individual and intersubjective constraints are outlined which can ensure its reliable exercise. The contextuality of argumentation, as it affects judgment, is discussed, and some conclusions are drawn about how acknowledgment (...) of the role of judgment in argumentation can influence our conception of the reasoning process. (shrink)