ISSA Proceedings 2010 – Image, Evidence, Argument


ISSA2010Logo1. Introduction
Suppose that visual argument skeptics are correct: there are no visual arguments apart from any associated verbal content. Does it follow, then, that there is no place for images in argumentation theory or informal logic? The answer to this question, I argue, is no – at least in the case of photographic images. Instead, photographic images can fill an evidentiary role in which the image acts as a verifier, corroborator or refuter of some claim within an argument. This result is satisfying in two ways. First, it makes room for images even under the most hostile conceptions of argument for visual argumentation. Second, it forms the basis of an answer to a related question in philosophy of mathematics. In philosophy of mathematics, there is a debate about the role of diagrams in mathematical reasoning. This debate, in some respects, mimics the debate about the use of visual elements in argumentation. I show that the use of images as verifiers in argumentative contexts can inform an answer about the use of some diagrams in mathematical contexts. Diagrams can verify, corroborate or refute claims in mathematical arguments.  Hence, though this doesn’t mean that diagrams are proofs, it means that diagrams can play an evidentiary role in mathematical contexts.

As a preamble to this discussion, I describe and label several positions one can take as regards visual evidence. On one end of the spectrum one finds the proponent of visual arguments. This is the position of Leo Groarke (Groarke 1996, Groarke 2002) and David Birdsell (Birdsell and Groarke, 1996, Birdsell and Groarke 2007). The proponent takes visual arguments to be no less legitimately arguments than any verbal arguments. For example, Groarke offers a poster from the University of Amsterdam as a putative visual argument (Groarke 1996, p. 112). Regarding the argumentative status of the poster, Groarke is unequivocal. He writes, “From the point of view of logic, the poster is something more than a statement, for it visually makes the point that the University of Amsterdam’s chief adminstrators are all men, to back the intended claim that the university needs more women.” (Groarke 1996, p. 111) A proponent of visual argument, then, takes the resources needed to analyze visual arguments to include logic broadly construed. Groarke doesn’t limit the analysis and evaluation of visual argumentation to just the rhetorical powers of images; though he doesn’t neglect these either. Instead, the proponent as I envision him or her, thinks that argumentation includes visual elements in the most robust forms possible. Therefore, Argumentation Theory and Informal Logic ought to expand to account for these visual elements explicitly. Read more

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ISSA Proceedings 2010 – Didactical Arguments And Mathematical Proofs


ISSA2010LogoThere seems to be a mismatch between the classification of arguments given by Aristotle at the beginning of the Sophistical Refutations and some influential contemporary theories of argument for they do not pay much attention to a whole kind of Aristotelian arguments, namely didactical arguments.

An explanation could be that didactical arguments are implicitly included in these theories. But if you grant that didactical arguments differ from dialectical arguments in many respects and if you consider that for these theories the very notion of argument is dialectical, this interpretation of the demise of didactical arguments is not very plausible unless it results from equivocation on the word “dialectical”.
After a review of Aristotle’s classification we shall examine these theories to see if they are well suited to accommodate the kind of argument Aristotle called didactical.

1. Aristotle’s four arguments
In the Sophistical Refutations (II, 165a-b) Aristotle claims there are four kinds of διαλέγεσθαι λoγων, an expression generally translated by “argument (or reasoning) involved in a discussion”. This expression can also be interpreted simply as “dialogue” or “dialectic”, taken in the broad sense of “talking together”. Although Aristotle neither uses the word “syllogism” nor “enthymeme” it seems reasonable to agree with the translation using the word “argument” since the Philosopher stresses that these discourses have premises. And it is these premises which make the main difference between the four kinds of argument. In short:
Dialectical arguments are rooted in an endoxa, a common opinion.
Critical arguments start from premises accepted by the answerer but also granted by the arguer for his discourse aims at “showing that he [the arguer] knows”.
Eristic arguments reason from premises that appear to be generally accepted but are not so. Read more

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ISSA Proceedings 2010 – Bi-Logical Analysis Of Arguments In Political Propaganda: The Case Of The Chilean Press 1970-1973


ISSA2010LogoThis paper is an attempt to bring together ideas discussed in several papers that I have read in conferences of the International Society for Studies in Argumentation and the Ontario Society for Studies in Argumentation (Durán 2007, 2008 and 2010). Its main thrust is the view that the study of argumentation should include the analysis of emotional, physical and intuitive arguments as well as logical ones. However, this paper concentrates on the contribution that the psychoanalytic theory of Bi-Logic has to offer for the study of argumentation.

I begin this paper by summarizing the main aspects of my research on the propaganda of agitation developed by the Chilean daily newspaper El Mercurio of Santiago against the government of Salvador Allende (1970-1973). A fully developed account of this study appears in my 1995 book (Durán 1995), and a summary of it was published in the Proceedings of the Sixth Conference of the International Society for the Study of Argumentation (Durán 2007). In essence, El Mercurio represented the interests of powerful enemies of Allende that felt threatened by his government, from the Chilean upper classes to the United States’ government and some influential multi-national corporations. The purpose of the propaganda of El Mercurio was to undermine the Allende government by instilling fear and hatred in the middle classes and the military so that a coup d’état could be staged. This happened on September 11, 1973 followed by a military dictatorship of 16 years led by General Augusto Pinochet. Read more

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ISSA Proceedings 2010 – The Extended Pragma-Dialectical Argumentation Theory Empirically Interpreted


1. The analytical status of the notion of ‘strategic maneuvering’
The notion of strategic maneuvering, introduced by van Eemeren and Houtlosser, is basically an analytic concept enabling a more refined, accurate and comprehensive account of ‘argumentative reality’ than can be achieved by means of the existing, purely dialectical tools of canonical, standard pragma-dialectics (van Eemeren & Houtlosser, 1999b, 2000, 2002a, 2000b; van Eemeren, 2010). With the help of the notion of strategic maneuvering it becomes possible to reconstruct argumentative discourse as it occurs in practice in such a way that not only the dialectical dimension pertaining to its reasonableness is taken into account, but also the rhetorical dimension pertaining to its effectiveness (van Eemeren, 2010). In sum, in the extended pragma-dialectical approach incorporating the theory of strategic maneuvering the standard analysis of argumentative discourse is systematically enriched with the use of rhetorical insight.

The extended pragma-dialectical argumentation theory in which classical and modern rhetorical insights are integrated in the existing pragma-dialectical tools for reconstruction – i.e. resolution-oriented reconstruction – offers in the first place analytical instruments for analysing and evaluating argumentative discourse. It is not an empirical model of the various ways in which ordinary arguers try to achieve effective persuasion within the boundaries of dialectical rationality.[i] Read more

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ISSA Proceedings 2010 – Argumentative Topoi For Refutation And Confirmation


ISSA2010LogoLong lists of topoi fill the manuals of classical rhetorical theory. There are topoi for the person and topoi for the act. There are topoi for encomia and topoi for the defence. Such lists are teaching devices designed to teach students particular aspects of the art of rhetoric. The lists are numerous, each author producing his own list. Within the realm of rhetoric topoi are a repeated theme, and the discussion usually concerns which topoi best suit each particular circumstance. The topoi for argumentation are taught in the two rhetorical exercises called “refutation” and “confirmation”. This paper will focus on six topoi from these rhetorical exercises suggesting that they are better for teaching argumentation to students than some modern approaches to argumentation.

First the term topos and its relationship to argumentation theory should be explained. A topos in Greek is literally a “place” for finding arguments. The “place” is often understood metaphorically as a “place” in the mind, and topoi can refer to many different kinds of mental places. Sara Rubinelli has made a distinction among the different kinds of strategies in classical rhetoric covered by the term topos. The term can be an indicator of the subject matter the orators might take into consideration for pleading their causes. Topos can also designate a certain argument scheme that focuses on the process of inference, such as the argument from the contrary. According to Latin rhetoricians, locus communis designates a ready-made argument that can be re-used by other speakers (2006, pp. 253-272). Read more

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ISSA Proceedings 2010 – Practical Reasoning In Political Discourse: Moral And Prudential Arguments In The Debate Over Bankers’ Bonuses In The British Press


This paper makes a proposal about the structure and representation of practical reasoning in political discourse. We provide an overview of the arguments that were used in a particular public debate on the fairness of bankers claiming and receiving bonuses in the present context of economic crisis and discuss the structure of those arguments. We adopt an instrumentalist approach to practical reasoning, which regards all reasons for action as means-end reasons. We argue that an instrumentalist approach is supported by the particular logic of political discourse: various types of action that are defended in political discourse are supposed to be means towards the realization of political goals, seen as states of affairs or modes of social organization informed by a normative commitment to various moral-political values (justice, equality, freedom).

We start from a distinction made in philosophy between two types of practical reasoning, “prudential” and “moral” (Gauthier 1963). Prudential arguments take the agent’s desires (wants, needs, interests) as premises: if the agent desires a certain outcome, then a certain course of action is recommended; if he doesn’t desire the outcome, the he has no reason to do the action. Moral arguments do not seem to have this conditional (hypothetical) structure, they present an action as necessary in itself, regardless of the agent’s desires or interests, regardless of any further goal that is desired, regardless of circumstances. Prudential reasoning corresponds to Kant’s hypothetical imperative, while moral reasoning corresponds to his categorical imperative. This might suggest that the structure of moral arguments is significantly different from that of prudential arguments.
The view we will defend here is that the two types of arguments have the same means-goal underlying structure, involving the same type of premises, but with significant differences in the agent’s relationship towards the goal (which he may or may not desire) and in the nature of the reasons that support or inform the goal (internal or external reasons). We suggest that, together with an adequate understanding of the Speaker-oriented (as opposed to Subject or Agent-oriented) nature of deontic modality, the distinction between internal (motivating) and external (normative) reasons for action is crucial to understanding the structure of practical reasoning, including practical reasoning in the political field. Our more general concern is to arrive at a conception of practical reasoning that can be used in the analysis and evaluation of political discourse and its characteristic genres (deliberation, debate) – see Fairclough and Fairclough (forthcoming) – within a version of Critical Discourse Analysis (Fairclough 2003, 2010). Read more

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