A pervasive feature of populism is the use of rescue narratives to stimulate emotional adherence with audience predicated on evoking fear versus hope for salvation. This paper argues that restricting the rhetorical appeal of rescue narratives to the affective domain obscures the argumentative function that these narratives partake in constructing political arguments. It, thus, claims that rescue narratives can perform as arguments when used to provide reasons to justify political action. The paper examines the way(s) Donald Trump employs (...) rescue narratives as arguments to justify military interventions in Iraq and Syria. The analytical framework supplements the argumentative strategies of the Discourse-Historical Approach to Critical Discourse Studies with pragma-dialectics’ argumentation schemes. The analysis shows that the different elements of the narrative construct premises for argument schemes adduced to justify the rightness of claims. Conceptualizing Trump’s rescue narratives as arguments prompts a reflection on the possibility of narrative discourse to be associated with the domain of reason. (shrink)

Why do we formulate arguments? Usually, things such as persuading opponents, finding consensus, and justifying knowledge are listed as functions of arguments. But arguments can also be used to stimulate reflection on one’s own reasoning. Since this cognitive function of arguments should be important to improve the quality of people’s arguments and reasoning, for learning processes, for coping with “wicked problems,” and for the resolution of conflicts, it deserves to be studied in its own right. This contribution develops first (...) steps towards a theory of reflective argumentation. It provides a definition of reflective argumentation, justifies its importance, delineates it from other cognitive functions of argumentation in a new classification of argument functions, and it discusses how reflection on one’s own reasoning can be stimulated by arguments. (shrink)

We explore a particular type of propagandistic message, which we call “provocative insinuation”. For example: ‘Iraqi refugee is convicted in Germany of raping and murdering teenage girl’. Although this sentence seems to merely report a fact, it also conveys a potentially hateful message about Iraqi refugees. We look at the argumentative roles that these utterances play in public discourse. Specifically, we argue that they implicitly address the question of the integration of refugees and migrants, and in fact aim to (...) tilt the audience against these groups by strongly inviting hearers to make generalisations based on “striking” properties. We examine different strategies to counteract the conveyed hateful message. (shrink)

One of the basic metatheoretical premises of pragma-dialectics is that “Argumentation has the general function of managing the resolution of disagreement.” From a Peircean perspective this is at best a partial truth. While it may be correct that in concrete, finite contexts, argumentation may function to manage the resolution of disagreement, in the long run argumentation will tend towards the Truth. Using Peirce as my compass, I will take argumentation to refer to the resolution function of thought (...) contingently situated and finitely understood. I will take argument to mean any structure or process which can serve as a real, compelling constraint upon thought in general. I will show that while the particular function of argumentation may be managing the resolution of disagreement, when situated within a Peircean-styled realism, argumentation will tend in the long run toward the Truth. I will end by showing that while argumentation may have a resolution function, its real measure and normative standard is growth rather than resolution per se. (shrink)

Douglas Walton has been right in calling us to attend to the pragmatics of argument. He has, however, also insisted that arguments should be understood and assessed by considering the functions they perform; and from this, I dissent. Argument has no determinable function in the sense Walton needs, and even if it did, that function would not ground norms for argumentative practice. As an alternative to a functional theory of argumentative pragmatics, I propose a design view, (...) which draws attention to the way participants strategically undertake and impose norms on themselves in order for their arguments to have force. (shrink)

Wave function realism is an interpretative framework for quantum theories which recommends taking the central ontology of these theories to consist of the quantum wave function, understood as a field on a high-dimensional space. This paper presents and evaluates three standard arguments for wave function realism, and clarifies the sort of ontological framework these arguments support.

We argue that the appraisal of models in social epistemology requires conceiving of them as argumentative devices, taking into account the argumentative context and adopting a family-of-models perspective. We draw up such an account and show how it makes it easier to see the value and limits of the use of models in social epistemology. To illustrate our points, we document and explicate the argumentative role of epistemic landscape models in social epistemology and highlight their limitations. We (...) also claim that our account could be fruitfully used in appraising other models in philosophy and science. (shrink)

In multi-agent systems (MAS), abstract argumentation and argumentation schemes are increasingly important. To be useful for MAS, argumentation schemes require a computational approach so that agents can use the components of a scheme to construct and present arguments and counterarguments. This paper proposes a syntactic analysis that integrates argumentation schemes with abstract argumentation. Schemes can be analysed into the roles that propositions play in each scheme and the structure of the associated propositions, yielding a greater understanding of the schemes, a (...) uniform method of analysis, and a systematic means to relate one scheme to another. This analysis of the schemes helps to clarify what is needed to provide denotations of the terms and predicates in a semantic model. (shrink)

This paper reconstructs the function argument of Aristotle’s Eudemian Ethics 2.1. The argument seeks to define happiness through the method of division; shows that the highest good is better than all four of the goods of the soul, not only two, as commentators have thought; and unlike the Nicomachean argument, makes the highest good definitionally independent of the human function.

The question of the function of reasoning is drawing increased attention. One suggestion is that the function of reasoning is argumentative: to find arguments to convince others and to evaluate others’ arguments. Darmstadter offers an alternative. According to this pragmatic theory the function of reasoning is to minimally adjust our beliefs so that they remain sound guides for action. This theory is similar to the classical view, which sees reasoning as a way of improving the reasoner's (...) beliefs and decisions. The pragmatic theory shares the classical view's flaws as a theory of the function of reasoning: it does not define reasoning strictly enough, it does not offer a convincing evolutionary rationale for reasoning's existence, it does not make predictions based on this rationale, and it does not properly test these predictions. Darmstadter also points out the importance of the phenomenon of deliberation failures. While I argue that documented deliberation failures are compatible with the argumentative theory of reasoning, Darmstadter's work usefully draws attention to the importance of studying reasoning outside the laboratory and in particular in argumentative situations. (shrink)

Most pupils become confident with narrative texts. However, studies show that pupils do not learn to master discursive genres in a satisfactory way. Therefore it is important to study pupils’ written argumentation and to develop knowledge about text production in an education that also highlights linguistic structures. The present article investigates written argumentations produced by 10–12 year-old pupils. The aim is to investigate perspectives in the texts, and thereby catch the entire texts—their content, function and form—and to relate text (...) analysis to interaction in the classroom. The theoretical framework emanates from the dialogical and triadic conception of language and text where ideational, relational and textual aspects play a central role. In this article the focus is on the three perspective dimensions—relief, hierarchy and sequences—in one argumentative text written by a 10-year-old girl and the discursive practice within which her text is produced. (shrink)

In multi-agent systems (MAS), abstract argumentation and argumentation schemes are increasingly important. To be useful for MAS, argumentation schemes require a computational approach so that agents can use the components of a scheme to construct and present arguments and counterarguments. This paper proposes a syntactic analysis that integrates argumentation schemes with abstract argumentation. Schemes can be analysed into the roles that propositions play in each scheme and the structure of the associated propositions, yielding a greater understanding of the schemes, a (...) uniform method of analysis, and a systematic means to relate one scheme to another. This analysis of the schemes helps to clarify what is needed to provide denotations of the terms and predicates in a semantic model. (shrink)

Truth is often considered to be a logico-linguistic tool for expressing indirect endorsements and infinite conjunctions. In this article, I will point out another logico-linguistic function of truth: to enable and validate what I call a blind argument, namely, an argument that involves indirectly endorsed statements. Admitting this function among the logico-linguistic functions of truth has some interesting consequences. In particular, it yields a new type of so-called conservativeness argument, which poses a new type of threat to deflationism (...) about truth. (shrink)

This contribution discusses some problems of Pragma-Dialectics and explains them by its consensualistic view of the function of argumentation and by its philosophical underpinnings. It is suggested that these problems can be overcome by relying on a better epistemology and on an epistemological theory of argumentation. On the one hand Pragma-Dialectics takes unqualified consensus as the aim of argumentation, which is problematic, (Sect. 2) on the other it includes strong epistemological and rationalistic elements (Sect. 3). The problematic philosophical underpinnings (...) of Pragma-Dialectics, specifically Critical Rationalism as well as Logical Constructivism and Dialogic Logic of the Erlangen School, are among the sources of this incoherence (Sect. 4). A detailed critique of the Pragma-Dialectical discussion rules shows the negative consequences of this foundation and indicates how they could be avoided (Sects. 5, 6). (shrink)

Name der Zeitschrift: Semiotica Jahrgang: 2018 Heft: 220 Seiten: 123-153.

From Fine and Kamp in the 70’s—through Osherson and Smith in the 80’s, Williamson, Kamp and Partee in the 90’s and Keefe in the 00’s—up to Sauerland in the present decade, the objection continues to be run that fuzzy logic based theories of vagueness are incompatible with ordinary usage of compound propositions in the presence of borderline cases. These arguments against fuzzy theories have been rebutted several times but evidently not put to rest. I attempt to do so in this (...) paper. (shrink)

This paper contains a positive development and a negative argument. It develops a theory of function loss and shows how this undermines an objection raised against the etiological theory of function in support of the modal theory of function. Then it raises two internal problems for the modal theory of function.

It is well known that the formal system developed by Frege in Begriffsschrift is based upon the distinction between function and argument—as opposed to the traditional distinction between subject and predicate. Almost all of the modern commentaries on Frege's work suggest a semantic interpretation of this distinction, and identify it with the ontological structure of function and object, upon which Grundgesetze is based. Those commentaries agree that the system proposed by Frege in Begriffsschrift has some gaps, but it (...) is taken as an essentially correct formal system for second-order logic: the first one in the history of logic. However, there is strong textual evidence that such an interpretation should be rejected. This evidence shows that the nature of the distinction between function and argument is stated by Frege in a significantly different way: it applies only to expressions and not to entities. The formal system based on this distinction is tremendously flexible and is suitable for making explicit the logical structure of contents as well as of deductive chains. We put forward a new reconstruction of the function-argument scheme and the quantification theory in Begriffsschrift. After that, we discuss the usual semantic interpretation of Begriffsschrift and show its inconsistencies with a rigorous reading of the text. (shrink)

In this paper, it is shown how formal dialectic can be extended to model multi-agent argumentation in which each participant is an agent. An agent is viewed as a participant in a dialogue who not only has goals, and the capability for actions, but who also has stable characteristics of types that can be relevant to an assessment of some of her arguments used in that dialogue. When agents engage in argumentation in dialogues, each agent has a credibility function (...) that can be adjusted upwards or downwards by certain types of arguments brought forward by the other agent in the dialogue. One type is the argument against the person or argumentum ad hominem, in which personal attack on one party's character is used to attack his argument. Another is the appeal to expert opinion, traditionally associated with the informal fallacy called the argumentum ad verecundiam. In any particular case, an agent will begin a dialogue with a given degree of credibility, and what is here called the credibility function will affect the plausibility of the arguments put forward by that agent. In this paper, an agent is shown to have specific character traits that are vital to properly judging how this credibility function should affect the plausibility of her arguments, including veracity, prudence, sincerity and openness to opposed arguments. When one of these traits is a relevant basis for an adjustment in a credibility function, there is a shift to a subdialogue in which the argumentation in the case is re-evaluated. In such a case, it is shown how the outcome can legitimately be a reduction in the credibility rating of the arguer who was attacked. Then it is shown how the credibility function should be brought into an argument evaluation in the case, yielding the outcome that the argument is assigned a lower plausibility value. (shrink)

In the debate over the moral status of nonsentient organisms, biocentrists argue that all living things, including nonsentient ones, have interests of their own. They often defend this claim by arguing that living organisms are goal-directed, functionally organized systems. This argument for ascribing interests has faced a serious challenge that is sometimes called the Problem of Scope. Critics have argued that ascribing interests on the basis of functional organization would have implausible implications regarding the scope of the argument, such as (...) ascribing interests to inanimate artifacts and machines. In this paper, I argue that much of the recent discussion on the Problem of Scope is based on an uncharitable interpretation of the argument for ascribing interests, which presupposes a reductionist account of functions. I assess this version of the argument, and explain why it cannot succeed. I then consider an alternative interpretation of the argument, which appeals to a non-reductionist account of functions. I argue that this version of the argument avoids the Problem of Scope, while acknowledging that it has limitations of its own. (shrink)

LOGIC‭ & ‬ARGUMENTATION‭ (‬VOLUME‭ ‬5) The first section deals with different ways,‭ ‬approaches or methods of the doing of philosophy or the methodology of philosophizing or the discourse and socio-cultural practice of the Western tradition of philosophy. -/- I then insert a number of articles and post concerning the fact that Philosophy in the Western World concentrates on the History of the Western Tradition of philosophical ideas,‭ ‬complaints that it is white,‭ ‬male and Euro-centered and that it has become too (...) academic,‭ ‬professional and institutionalized. -/- The subsequent sections deal with the topics of Logic and a number of notions‭ ‬related to‭ ‘‬logic‭’‬.‭ ‬The logic referred to are those that are relevant to philosophy or the doing of philosophizing.‭ ‬Truth,‭ ‬meaning,‭ ‬arguments and argumentation are then dealt with.‭ ‬This leads to another section on logic and finally reasoning is mentioned as the coming together of most of the previous sections. -/- If you wish to think and write about multi-dimensional things like the‭ ‘‬world‭’‬,‭ ‬embodied persons,‭ ‬consciousness,‭ ‬human thinking etc,‭ ‬you should at least think multi-dimensional and many levelled.‭ ‬Attempting to investigate,‭ ‬reflect on and‭ ‬describe the nature and functioning of these multi-dimensional,‭ ‬many-levelled‭ ‬entities in a one-dimensional,‭ ‬verbal,‭ ‬linear manner surely is irrational and do not make sense‭? ‬Visual Argument Mapping is one of these multi-dimensional,‭ ‬many-levelled tools.‭ (‬See Appendix‭). (shrink)

The purpose of this paper is to show whether the two crucial dimensions used for assessing the quality of argumentation, argument-as-a-product (argument structure) and argument-as-a-process (relevance), are interrelated, and how they can be used to assess the effect of argumentative mode on students’ arguments. To this purpose, a twofold coding scheme will be developed, aimed at capturing: a) the argumentative function of evidence use and b) the dialogical relevance of evidence use. A study will be described in (...) which students’ use of evidence is elicited in two distinct argumentative modes (dialogical vs. non-dialogical). According to the results, in the dialogical mode students tended to use evidence in a more sophisticated way from both argument evaluation perspectives. (shrink)

A generally ignored feature of Aristotle’s famous function argument is its reliance on the claim that practitioners of the crafts (technai) have functions: but this claim does important work. Aristotle is pointing to the fact that we judge everyday rational agency and agents by norms which are independent of their contingent desires: a good doctor is not just one who happens to achieve his personal goals through his work. But, Aristotle argues, such norms can only be binding on individuals (...) if human rational agency as such is governed by objective teleological norms.
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Argumentations are at the heart of the deductive and the hypothetico-deductive methods, which are involved in attempts to reduce currently open problems to problems already solved. These two methods span the entire spectrum of problem-oriented reasoning from the simplest and most practical to the most complex and most theoretical, thereby uniting all objective thought whether ancient or contemporary, whether humanistic or scientific, whether normative or descriptive, whether concrete or abstract. Analysis, synthesis, evaluation, and function of argumentations are described. Perennial (...) philosophic problems, epistemic and ontic, related to argumentations are put in perspective. So much of what has been regarded as logic is seen to be involved in the study of argumentations that logic may be usefully defined as the systematic study of argumentations, which is virtually identical to the quest of objective understanding of objectivity. (shrink)

According to the conceivability argument, physicalism is false since it is conceivable and hence possible that the physical truth do not entail the phenomenal truth. The influential way of responding to the conceivability argument is to claim that our conceivability intuitions can be accounted for in purely psychological terms, by appealing to some cognitive and functional differences between phenomenal and physical concepts, and that therefore what is conceivable does not entail what is possible. On this account, the entailment from the (...) physical to the phenomenal that physicalism is committed to can be necessary and a posteriori. I argue that this way of responding to the conceivability argument cannot work. The conceivability argument depends on an assumption which implies that the psychophysical entailment cannot be necessary and a posteriori and appealing to the differences between phenomenal and physical concepts has no force against that assumption. (shrink)

Testable predictions of quantum mechanics are invariant under time reversal. But the evolution of the quantum state in time is not so, neither in the collapse nor in the no-collapse interpretations of the theory. This is a fact that challenges any realistic interpretation of the quantum state. On the other hand, this fact raises no difficulty if we interpret the quantum state as a mere calculation device, bookkeeping past real quantum events.

This article utilises Luhmann's functional analysis to investigate the role played by legal argumentation within the legal system. Luhmann's sociological observations on this subject suggest an alternative to jurisprudential approaches that understand legal arguments and consequent decisions in terms of the relative strengths of the justifications offered in their support. His account examines the role played by legal argumentation in allowing the legal system to evolve in response to society's increasing complexity. The concepts he employs to analyse this evolutionary capacity (...) of law, developed from their origins in information theory, are redundancy and variety. Beginning with the work of Dworkin the article opens up Luhmann's analysis to consider how legal argumentation operates both as a grounded form of communication, capable of identifying weak or unsustainable interpretations of legal texts, and a mechanism for evolving law in the direction of increasing complexity. (shrink)

We show that at each type k ≥ 2, there exist c-irreducible functionals of c-r.e. degree, as defined in [Nor 1]. Our proofs are based on arguments due to Hinman, [Hin 1], and Dvornikov, [Dvo 1].

In English discourse one can find cases of the expression ‘not for nothing’ being used in argumentation. The expression can occur both in the argument and in the standpoint. In this chapter we analyse the argumentative and rhetorical aspects of ‘not for nothing’ by regarding this expression as a presentational device for strategic manoeuvring. We investigate under which conditions the proposition containing the expression ‘not for nothing’ functions as a standpoint, an argument or neither of these elements. It is (...) also examined which type of standpoint and which types of argument scheme the expression typically co-occurs with. In doing so we aim to develop a better understanding of the role and effects of ‘not for nothing’ when used in argumentation. Finally, we show that the strategic potential of ‘not for nothing’ lies in its suggestion that sufficient support has been provided while this support has in fact been left implicit. (shrink)

In this paper, I examine the strategic function of four variants of pragmatic argumentation in the context of advisory health brochures. I argue that each variant functions as a strategic manoeuvre that deals with potential countermoves: with variant I and II writers can address anticipated doubt with respect to the standpoint and with variants III and IV they can strategically erase potential criticism of or possible alternatives to the proposed action. Keywords: health brochures, health communication, pragma-dialectical theory, pragmatic argumentation, (...) strategic maneuvering. (shrink)

The article outlines a general epistemological theory of argument: a theory that regards providingjustified belief as the principal aim of argumentation, and defends it instrumentalistically. After introducing some central terms of such a theory (2), answers to its central questions are proposed: the primary object and structure of the theory (3), the function of arguments, which is to lead to justified belief (4), the way such arguments function, which is to guide the addressee's cognizing (5), objective versus subjective (...) aspects of argumentation (6), designing different types of argument (7). Then the notion of '(argumentatively) valid argument' is defined and criteria for the adequate use of such arguments are introduced (8). Finally, this conception is justified as, among others, leading to more true beliefs than competing conceptions (9). (shrink)

This paper aims to accessibly present, and then critique, Hugo Mercier and Dan Sperber's recent proposals for the evolutionary function of human reasoning. I take a critical look at the main source of experimental evidence that they claim as support for their view, namely the confirmation or “myside” bias in reasoning. I object that Mercier and Sperber did not adequately argue for a claim that their case rests on, namely that it is evolutionarily advantageous for you to get other (...) people to believe whatever you antecedently believe. And I give my own argument that this claim is false. I also critically look at their suggestion that reasoning has a justificatory function, functioning as a kind of reputation management tool. I argue this suggestion does not amount to a plausible evolutionary function. (shrink)

This study examines the intertextual influence of the courtroom spoken genre with the written genre used by judge’s summing up and lawyers’ closing arguments in Ethiopian Criminal court trial. In doing so, it employs the relational and comparison-expository structuring models. The relational struc- turing is used to give emphasis to the manner in which evidence items bear on particular issues and shows how evidence items are related to each other and to major facts in issues of judge’s summing-up while the (...) comparison-expository structure is to intertextually link the spoken genres of the two opposing lawyers’ views with the Ethiopian criminal law written statutes. The findings of the study suggest that mixed rhetorical strategies, the judge’s relational summing up and the lawyers’ comparison-expository closing arguments, are more effective than a strict narrative strategy in addressing the final judgment of the argumenta- tion. (shrink)

The present paper reports a set of experimental studies concerning the comprehension of French argumentative operators and connectives.The first part is a presentation of the theoretical framework, the methodological problems and some of the most general results. Experiments were carried out in the perspective of the linguistic theory of argumentation developed by Anscombre and Ducrot. According to this theory, a number of devices in language are mainly defined by their argumentation function, i.e. by the types of discursive sequences (...) and conclusions they involve. Three categories of such devices were examined: (1) operators like “presque” (almost), “à peine” (hardly), “au moins” (at least), etc. which give an argumentative orientation to the statement; (2) co-orientation connectives, like “même” (even), which relate two statements oriented towards the same conclusion; (3) counter-orientation connectives, like the concessive ones (“mais” (but), “quand même” (even so), etc.), which relate two statements oriented towards opposite conclusions. The data shed light on issues such as: What is the nature of the relationship between the informative and argumentative functions of different operators? Is there a hierarchical relation between the argumentative processes of “co-orientation” and “counter-orientation”? What is the role of negation in the processing of argumentative sequences?The second part of the paper focuses specifically on the study of how 8 and 10 year-old children process “counter-oriented” statements. Five concessive connectives were studied: “mais”, “pourtant”, “quand même”, “même si”, “bien que”. The test was composed of two successive completion tasks: in one task the children had to choose the relevant context of complex sentences involving concessive connectives; in the other task they had to choose their relevant conclusion. Main results show a clear evolution in the performance of children between 8 and 10, suggesting that concessive strategies are not completely mastered at the age of 8. Differences among the concessive connectives studied were brought out: the item “quand même” obtained much better results than the other items with 8-year-old subjects; statements with “mais” seemed to be better processed in the conclusion task than in the context task, especially by 10-year-old subjects. These results are compared with other data obtained in some of the numerous studies on the production and comprehension of concessive connectives in various languages, and discussed from the point of view of argumentative theory. (shrink)

Event-causal libertarians maintain that an agent’s freely bringing about a choice is reducible to states and events involving him bringing about the choice. Agent-causal libertarians demur, arguing that free will requires that the agent be irreducibly causally involved. Derk Pereboom and Meghan Griffith have defended agent-causal libertarianism on this score, arguing that since on event-causal libertarianism an agent’s contribution to his choice is exhausted by the causal role of states and events involving him, and since these states and events leave (...) it open which decision he will make, he does not settle which decision occurs, and thus “disappears.” My aim is to explain why this argument fails. In particular, I demonstrate that event-causal libertarians can dismantle the argument by enriching the reductive base in their analysis of free will to include a state that plays the functional role of the self-determining agent and with which the agent is identified. (shrink)

This paper argues that the problem of expertise calls for a rapprochement between social epistemology and argumentation theory. Social epistemology has tended to emphasise the role of expert testimony, neglecting the argumentative function of appeals to expert opinion by non-experts. The first half of the paper discusses parallels and contrasts between the two cases of direct expert testimony and appeals to expert opinion by our epistemic peers, respectively. Importantly, appeals to expert opinion need to be advertised as such, (...) if they are to sway an epistemic peer. The second half of the paper sketches a theoretical framework for thinking about assessments of expertise in a unified way, via a ‘default and challenge’ model that emphasises the need for a version of conversational scorekeeping. It is through such scorekeeping that interlocutors can track and coordinate their differences in epistemic outlook. The paper concludes with a genealogical perspective on the function of (attributions of) expertise: acceptance of another’s appeal to expert opinion may be construed as tacit agreement that inquiry, for now, has been taken far enough. (shrink)

Speech act theory seems to provide a promising avenue for the analysis of the functional organization of argument. The theory, however, might be taken to suggest that arguments are a homogenous class of speech act with a specifiable illocutionary force and a single set of felicity conditions. This suggestion confuses the analysis of the meaning of speech act verbs with the analysis of the pragmatic structure of actual language use. Suggesting that arguments are conveyed through a homogeneous class of linguistic (...) action overlooks the way in which the context of activity and the form of expression organize the argumentative functions performed in using language. An alternative speech act analysis would treat folk terminology as a heuristic entry point into the development of a technical analysis of the myriad argumentative functions and structures to be found in natural language use. This would lead to a thorough-going pragmatic analysis of the rational and functional design of speech acts in argumentation. (shrink)

J. Richard Gott III (1993) has used the “Copernican principle” to derive a probability density function for the total longevity of any phenomenon, based solely on the phenomenon’s past longevity. John Leslie (1996) and others have used an apparently similar probabilistic argument, the “Doomsday Argument,” to claim that conventional predictions of longevity must be adjusted, based on Bayes’ Theorem, in favor of shorter longevities. Here I show that Gott’s arguments are flawed and contradictory, but that one of his conclusions—his (...) delta t formula—is mathematically equivalent to Laplace’s famous (and notorious) ‘rule of succession’; moreover, Gott’s delta t formula is a plausible worst-case (if one favors greater longevity) bound in some contexts. On the other hand, the Doomsday Argument is fallacious: the argument’s Bayesian formalism is stated in terms of total duration, but all attempted real-life applications of the argument—with one exception, an application by Gott 1994—actually plug in prior probabilities for future duration; moreover, the Self-Sampling Assumption, an essential premise of the Doomsday Argument, is contradicted by the prior information in all known real-life cases. But rejecting the Doomsday Argument does not entail rejecting the possibility of learning about the future from the past. Applying the work of Bruce M. Hill (1968, 1988, 1993) and Frank P.A. Coolen (1998, 2006) in the field of non-parametric predictive inference, I propose and defend an alternative methodology for quantifying how past longevity of any phenomenon does provide evidence for future longevity. In so doing, I identify an objective standard by which to choose among counting time intervals, counting population, or counting any other measure of past longevity in predicting future longevity. This methodology forms the basis of a calculus of induction. (shrink)

_Arguments from Ignorance _explores the situations in which the argument from ignorance functions as a respectable form of reasoning and those in which it is indeed fallacious. Douglas Walton draws on everyday conversations on all kinds of practical matters in which the _argumentum ad ignorantiam _is used quite appropriately to infer conclusions. He also discusses the inappropriate use of this kind of argument, referring to various major case studies, including the Salem witchcraft trials, the McCarthy hearings, and the Alger Hiss (...) case. This book makes an original contribution in the areas of argumentation theory and informal logic, contending that, despite its traditional classification as a fallacy, the argument from ignorance is a genuine, very common, and legitimate type of argumentation with an identifiable structure. But the book is also interdisciplinary in scope, explaining many widely interesting and controversial subjects in artificial intelligence, medical education, philosophy of science, and philosophy of law in a clear way that makes it accessible to a broad range of readers. (shrink)

This study focuses on the use and function of refutation in two televised debates during which candidates who have reached the second round of the French presidential elections come face to face. The aim of this study is to examine the forms and functions of refutation within the theoretical framework of dialogism. The rhetorical-argumentative functions of refutation and the challenges of this discursive practice in the genre “televised political debate” will also be put forward.

The paper provides an argument for the thesis that an agent’s degrees of disbelief should obey the ranking calculus. This Consistency Argument is based on the Consistency Theorem. The latter says that an agent’s belief set is and will always be consistent and deductively closed iff her degrees of entrenchment satisfy the ranking axioms and are updated according to the ranktheoretic update rules.

“Triviality arguments” against functionalism in the philosophy of mind hold that the claim that some complex physical system exhibits a given functional organization is either trivial or has much less content than is usually supposed. I survey several earlier arguments of this kind, and present a new one that overcomes some limitations in the earlier arguments. Resisting triviality arguments is possible, but requires functionalists to revise popular views about the “autonomy” of functional description.

ABSTRACT: In this essay I characterize arguments by analogy, which have an impor- tant role both in philosophical and everyday reasoning. Arguments by analogy are dif- ferent from ordinary inductive or deductive arguments and have their own distinct features. I try to characterize the structure and function of these arguments. It is further discussed that some arguments, which are not explicit arguments by analogy, nevertheless should be interpreted as such and not as inductive or deductive arguments. The result is (...) that a presumed outcome of a philosophical dispute will have to be reconsidered. (shrink)

Short abstract (98 words). Reasoning is generally seen as a means to improve knowledge and make better decisions. However, much evidence shows that reasoning often leads to epistemic distortions and poor decisions. This suggests that the function of reasoning should be rethought. Our hypothesis is that the function of reasoning is argumentative. It is to devise and evaluate arguments intended to persuade. Reasoning so conceived is adaptive given humans’ exceptional dependence on communication and vulnerability to misinformation. A (...) wide range of evidence in the psychology of reasoning and decision making can be reinterpreted and better explained in the light of this hypothesis. (shrink)