This paper highlights the difference between Lilian Bermejo-Luque’s account of warrants with the quite different accounts of warrants offered by Toulmin, Hitchcock, and myself, and lays out some of the reasons why I think a “Toulminesque” account of warrants captures crucial aspects of arguing more adequately than her account does.

This paper challenges the view that arguments are (by definition, as it were) attempts to persuade or convince an audience to accept (or reject) a point of view by presenting reasons for (or against) that point of view. I maintain, first, that an arguer need not intend any effect beyond that of making it manifest to readers or hearers that there is a reason for doing some particular thing (e.g., for believing a certain proposition, or alternatively for rejecting it), and (...) second that when an arguer is in fact trying to induce an effect above and beyond rendering a reason manifest, the effect intended—the use to which his or her argument is put—need not be that hearers do what the stated reasons are reasons for doing. Where the actual or intended effect of making a reason R for doing X manifest is something other than doing X, I call it an oblique—as opposed to a direct—effect of making that reason manifest. The core of the paper presents an overview or map of the main categories of effect which arguments can have, and the main sub-types within each category, calling attention to the points at which such effects can be indirect or oblique effects. The purpose of that typology is to make it clear (i) how oblique effects can come about and (ii) how important a role they can play in the conduct of argumentation. (shrink)

Even with the lack of consensus on the nature of an argument, the thesis that explanations and arguments are distinct is near orthodoxy in well-known critical thinking texts and in the more advanced argumentation literature. In this paper, I reconstruct two rationales for distinguishing arguments from explanations. According to one, arguments and explanations are essentially different things because they have different structures. According to the other, while some explanations and arguments may have the same structure, they are different things because (...) explanations are used for different purposes than arguments. I argue that both rationales fail to motivate a distinction between arguments and explanations. Since these are the only rationales for distinguishing arguments from explanations that I am prepared to take seriously, I don’t see why we should exclude explanations from being arguments. (shrink)

Wellman identified three types of conductive arguments, the third of which contains both pro and counter-considerations in the same piece of reasoning. This paper provides a pragma-dialectical analysis of this type of argumentation, with special focus on argumentation reconstruction. It argues that the account of pro/con argumentation in the framework of argument-as-product has problems solvable by a pragma-dialectical approach. The paper asserts that pro/con argumentation should be analyzed as a dialectical strategy of a protagonist, where acknowledgement of counter-considerations shows that (...) the antagonist’s reasons have been taken into consideration, although the pro-considerations override them. Thus, the pro-considerations of pro/con argumentation should be interpreted as the protagonist’s overriding defeaters of the antagonist’s counter-arguments, the protagonist incorporating the latter as counter-considerations. The paper further argues that the pragma-dialectical framework needs an additional conceptual tool to properly reconstruct complex forms of pro/con argumentation. Finally, the pragma-dialectical approach to reconstruct pro/con argumentation has several advantages, especially to a more logical-structural approach to complex pro/con argumentation. (shrink)

When people argue, they are vulnerable to unwanted and costly changes in their beliefs. This vulnerability motivates the position that belief involuntarism makes argument inherently adversarial, as well as the development of alternatives to adversarial argumentation such as “invitational rhetoric”. The emphasis on involuntary belief change in such accounts, in our perspective, neglects three dimensions of arguing: the diversity of arguer intentions, audience agency, and the benefits of belief change. The complex impact of arguments on both audiences and arguers involves (...) vulnerabilities related to various forces of argument, not just the intellectual force of premise-conclusion complexes. Shifting emphasis from adversariality to vulnerability, we propose a more holistic understanding of argument, in which vulnerability reveals various sources of strength and opportunity in addition to risk. (shrink)

Making arguments makes reasons apparent. Sometimes those reasons may affect audiences’ relationships to claims. But an over-emphasis on audience effects encouraged by functionalist theories of argumentation distracts attention from other things that making arguments can accomplish. We advance the normative pragmatic program on argumentation through two case studies of how early advocates for women’s suffrage in the U.S. made reasons apparent in order to show that what they were doing wasn’t ridiculous. While it might be possible to identify this as (...) a new function of argumentation, we encourage instead attention to a more important question: explaining how all the diverse uses of argument have pragmatic force. (shrink)

Corroborative evidence has a dual function in argument. Primarily, it functions to provide direct evidence supporting the main conclusion. But it also has a secondary, bolstering function which increases the probative value of some other piece of evidence in the argument. This paper argues that the bolstering effect of corroborative evidence is legitimate, and can be explained as counter–rebuttal achieved through inference to the best explanation. A model (argument diagram) of corroborative evidence, representing its structure and operation as a schematic (...) pattern of defeasible argument is also supplied. In addition to explaining the operation and theoretical foundation of corroborative evidence, the model facilitates the correct analysis and guides the evaluation (assessment and critique) of corroborative evidence as it occurs in argument. (shrink)

This brief editorial considers a special issue of Argumentation edited by Jens Kjeldsen on visual, multimodal argumentation. It provides a commentary on important advances on interpretative problems such as the propositionality of argument, the reducibility of images to words, whether argument products are primarily cognitive artifacts, and the nature of a modality of argument. Concerning the project of argument appraisal, it considers whether visual arguments call for a revision of our normative, evaluative apparatus.

As a learning tool, argument and decision maps enable students to hone their interpretive and analytical skills. This paper illustrates one effective approach to teaching the diagrammat­ic conventions used in a powerful decision and argument mapping methodology. The twenty example maps included begin with a configuration illustrating one reason offered in support of a conclusion, and build to highly complex maps illustrating the analyses of real world decisions as recorded in interviews and official documents. Using their interpretive and analytical skills, (...) and the simple conventions taught and illustrated here, students and researchers are able to build and to refine maps that show simple arguments, lines of reasoning, unspoken but implicit as­sumptions, pro and con argumentation, individual and group decision making, the influences of reactive cognitive heuristics on decision making, the use of various familiar valid and fallacious inference patterns, and the bolstering phenomenon associated with the use of multiple arguments in support of a given option. (shrink)

Some have suggested that images can be arguments. Images can certainly bolster the acceptability of individual premises. We worry, though, that the static nature of images prevents them from ever playing a genuinely argumentative role. To show this, we call attention to a dilemma. The conclusion of a visual argument will either be explicit or implicit. If a visual argument includes its conclusion, then that conclusion must be demarcated from the premise or otherwise the argument will beg the question. If (...) a visual argument does not include its conclusion, then the premises on display must license that specific conclusion and not its opposite, in accordance with some demonstrable rationale. We show how major examples from the literature fail to escape this dilemma. Drawing inspiration from the graphical logic of C. S. Peirce, we suggest instead that images can be manipulated in a way that overcomes the dilemma. Diagrammatic reasoning can take one stepwise from an initial visual layout to a conclusion—thereby providing a principled rationale that bars opposite conclusions—and the visual inscription of this correct conclusion can come afterward in time—thereby distinguishing the conclusion from the premises. Even though this practical application of Peirce’s logical ideas to informal contexts requires that one make adjustments, we believe it points to a dynamic conception of visual argumentation that will prove more fertile in the long run. (shrink)

A broad assumption in argumentation theory is that argumentation primarily regards resolving, confronting, or managing disagreement. This assumption is so fundamental that even when there does not appear to be any real disagreement, the disagreement is suggested to be present at some other level. Some have questioned this assumption (most prominently, Perelman and Olbrechts-Tyteca, and Doury), but most are reluctant to give up on the key idea that persuasion, the core of argumentation theory, can only regard disagreements. We argue here (...) that this assumption is false. Argument may be as much about strengthening or maintaining agreement as it is about disagreement. Once we see how argument is possible and manifestly enacted under conditions of agreement, then we have tools to explain otherwise curious fallacies and argumentative phenomena. (shrink)

The aim of this paper is to defend the claim that arguments are truth-directed, and to discuss the role that truth plays in the evaluation of arguments that are truth-directed. It concludes that the proper place of truth is in the metatheory in terms of which a theory of evaluation is to be worked out, rather than in the theory of evaluation itself as a constraint on premise adequacy.

In a 2006 paper I claimed that the virtue arguments or inferences must have is not that they be truth-preserving, but that they be entitlement-preserving. I offered two reasons there why such a conception of argument virtue is needed for a satisfactory treatment of defeasible arguments and inferences. This paper revisits that claim, and assesses the prospects for a more thorough defence than was offered in that paper.

This paper pictures emotions as able to provide reasons for action in so far as the beliefs and desires which make up reasons for action are constitutive elements of emotions themselves. It claims that the states of the world which prompt emotional attitudes “justify” them in so far as they render the beliefs constitutive of those attitudes true. Finally, it addresses the question what can make the desires or valuings ingredient to emotions appropriate to their objects.

The concept of conductive argument weight was developed by Carl Wellman and later by Trudy Govier. This concept has received renewed attention recently from another informal logician, Robert C. Pinto. Argument weight has also been addressed in recent years by theorists in AI & Law. I argue from a non-technical perspective that some aspects of AI & Law’s approach to argument weight can be usefully applied to the issues addressed by Pinto. I also relate some of these issues to the (...) work of argument theorist Harald Wohlrapp. (shrink)

The question of emotion in argumentation has received considerable attention in recent years. But there is a tension between the traditional normative role of informal logic, and the inclusion of emotion which is viewed as notoriously unstable. Here I argue that that, a] there is always emotion in an argument; b] that the presence of emotion is a good thing; and c] that we can and ought model and teach the use of emotion in Argumentation Theory.

As appeals to expert authority shift from “fallacies” to “argument schemes,” argumentation theorists are called on to provide critical questions for assessing them. I argue that current treatments focus too heavily on assessing expertise, and not enough on judging trustworthiness. I propose instead a norma-tive pragmatic account of the rational force of the appeal to expert authority, one that emphasizes the ex-pert's actions in constructing his/her own legitimate trustworthiness.