Contemporary reasoning about health is infused with the work products of experts, and expert reasoning about health itself is an active site for invention and design. Building on Toulmin’s largely undeveloped ideas on field-dependence, we argue that expert fields can develop new inference rules that, together with the backing they require, become accepted ways of drawing and defending conclusions. The new inference rules themselves function as warrants, and we introduce the term “warranting device” to refer to an assembly of the (...) rule plus whatever material, procedural, and institutional resources are required to assure its dependability. We present a case study on the Cochrane Review, a new method for synthesizing evidence across large numbers of scientific studies. After reviewing the evolution and current structure of the device, we discuss the distinctive kinds of critical questions that may be raised around Cochrane Reviews, both within the expert field and beyond. Although Toulmin’s theory of field-dependence is often criticized for its relativism, we find that, as a matter of practical fact, field-specific warrants do not enjoy immunity from external critique. On the contrary, they can be opened to evaluation and critique from any interested perspective. (shrink)

In academic contexts the appeal to authority is a quite common but seldom tested argument, either because we accept the authority without questioning it, or because we look for alternative experts or reasons to support a different point of view. But, by putting ourselves side by side an already accepted authority, we often rhetorically manoeuvre to displace the burden of the proof to avoid the fear to present our opinions and to allow face saving.

I argue that there is no fallacy of argument from authority. I first show the weakness of the case for there being such a fallacy: text-book presentations are confused, alleged examples are not genuinely exemplary, reasons given for its alleged fallaciousness are not convincing. Then I analyse arguing from authority as a complex speech act. Rejecting the popular but unjustified category of the "part-time fallacy", I show that bad arguments which appeal to authority are defective through breach of some felicity (...) condition on argument as a speech act, not through employing a bad principle of inference. (shrink)

The Linda paradox is a key topic in current debates on the rationality of human reasoning and its limitations. We present a novel analysis of this paradox, based on the notion of verisimilitude as studied in the philosophy of science. The comparison with an alternative analysis based on probabilistic confirmation suggests how to overcome some problems of our account by introducing an adequately defined notion of verisimilitudinarian confirmation.

I consider some uses of citations in academic writing and analyze them as instances of the “appeal to expert opinion” argumentative scheme to show that the critical questions commonly linked to this scheme are difficult to apply. I argue that, by considering citations as special communicative and argumentative situated acts, their use in real practice can be explained more adequately. Adaptation to the audience and to the social constraints is common and necessary in order to collaborate with others and to (...) advance in a discipline, but also to attain rhetorical goals that differ from strictly cognitive ones. (shrink)

“Black box argument” is a metaphor for modular components of argumentative discussion that are, within a particular discussion, not open to expansion. In public policy debate such as the controversy over abstinence-only sex education, scientific conclusions enter the discourse as black boxes consisting of a result returned from an external and largely impenetrable process. In one way of looking at black box arguments, there is nothing fundamentally new for the argumentation theorist: A black box argument is very like any other (...) appeal to authority, and what might be said about any particular form of black box will turn out to be a particularized version of what might be said about evaluating arguments based on authority. But in another way of looking at black box arguments, they are a constantly evolving technology for coming to conclusions and making these conclusions broadly acceptable. Black boxes are to argumentation what material inventions are to engineering and related sciences. They are anchored in and constrained by fundamental natural processes, but they are also new things that require theoretical explication and practical assessment. (shrink)

This essay proposes a design perspective on argumentation, intended as complementary to empirical and critical scholarship. In any substantive domain, design can provide insights that differ from those provided by scientific or humanistic perspectives. For argumentation, the key advantage of a design perspective is the recognition that humanity’s natural capacity for reason and reasonableness can be extended through inventions that improve on unaided human intellect. Historically, these inventions have fallen into three broad classes: logical systems, scientific methods, and disputation frameworks. (...) Behind each such invention is a specifiable “design hypothesis”: an idea about how to decrease error or how to increase the quality of outcomes from reasoning. As problems in contemporary argumentation practice become more complex, design thinking rises in relevance and importance. A design research agenda in argumentation would focus on theorizing design innovations and on evaluating design hypotheses. (shrink)

This paper discusses the ways in which a person’s character ( ethos ) and a hearer’s emotional response ( pathos ) are part of the complex judgments made about experts’ claims, along with an actual assessment of those claims ( logos ). The analysis is rooted in the work of Aristotle, but expands to consider work on emotion and cognition conducted by Thagard and Gigerenzer. It also draws on some conclusions of the general epistemology of testimony (of which expert testimony (...) is a special subset), where it is argued that we learn not just from the transmission of another’s beliefs, but from the words they speak. This shifts the onus in testimony away from the intentions of a speaker onto the judgments of an audience, capturing better its social character and reflecting our experience of receiving testimony. I conclude, however, that accepting the arguments of experts involves much more than simply believing what they say. (shrink)

The traditional concepts of rhetorical strategy and argumentative fallacy cannot be readily reconciled. Doing so requires escaping the following argument: All argumentation involves rhetorical strategies. All rhetorical strategies are violations of logical or dialectical ideals. All violations of logical or dialectical ideals are fallacies. Normative pragmatics provides a perspective in which rhetorical strategies can be seen to have the potential for constructive contributions to argumentation and in which fallacies are not simply violations of ideals. One kind of constructive contribution, framing (...) moves, is illustrated with the case of Lyndon Johnson’s 1964 TV campaign commercial known as the Daisy ad. (shrink)

The classical conception of rhetoric as the method of reasoned political judgment survived into the Renaissance but was reduced to academic critiques of style and "empty" public rhetoric with the rise of modern science and its representationalist theories of language. Recently, however, rhetoric, textuality, and the "linguistic turn" generally, have become central metaphors in the human sciences. This renewed rhetorical perspective not only fosters a critique of positive philosophy and of scientism in public discourse, it also offers affirmative methods by (...) which persons can construct their civic lives. (shrink)