The Port-Royal Logic's Theory of Argument

This is a critical examination of Antoine Arnauld's Logic or the Art of Thinking (1662), commonly known as the Port-Royal Logic. Rather than reading this work from the viewpoint of post-Fregean formal logic or the viewpoint of seventeenth-century intellectual history, I approach it with the aim of exploring its relationship to that contemporary field which may be labeled informal logic and/or argumentation theory. It turns out that the Port-Royal Logic is a precursor of this current field, or conversely, that this field may be said to be in the same tradition.     

A Survey of 25 Years of Research on Legal Argumentation

This essay discusses the developments and trends of research in legalargumentation of the last 25 years. The essay starts with a survey of thevarious approaches which can be distinguished: the logical approach, therhetorical approach, and the dialogical approach. Then it identifies varioustopics in the research, which constitute the various components of aresearch programme of legal argumentation: the philosophical component, thetheoretical component, the reconstruction component, the empiricalcomponent, and the practical component. It concludes with a discussion ofthe main trends in the research of the last 25 years.     

Some Syntactic Approaches to the Handling of Inconsistent Knowledge Bases: A Comparative Study Part 1: The Flat Case

This paper presents and discusses several methods for reasoning from inconsistent knowledge bases. A so-called argued consequence relation, taking into account the existence of consistent arguments in favour of a conclusion and the absence of consistent arguments in favour of its contrary, is particularly investigated. Flat knowledge bases, i.e., without any priority between their elements, are studied under different inconsistency-tolerant consequence relations, namely the so-called argumentative, free, universal, existential, cardinality-based, and paraconsistent consequence relations. The syntax-sensitivity of these consequence relations is studied. A companion paper is devoted to the case where priorities exist between the pieces of information in the knowledge base.     

Relevance

Relevance is a triadic relation between an item, an outcome or goal, and a situation. Causal relevance consists in an item's ability to help produce an outcome in a situation. Epistemic relevance, a distinct concept, consists in the ability of a piece of information (or a speech act communicating or requesting a piece of information) to help achieve an epistemic goal in a situation. It has this ability when it can be ineliminably combined with other at least potentially accurate information to achieve the goal. The relevance of a conversational contribution, premiss relevance and conclusion relevance are species of epistemic relevance thus defined. The conception of premiss relevance which results provides a basis for determining when the various arguments ad called fallacies of relevance are indeed irrelevant. In particular, an ad verecundiam appeal is irrelevant if the authority cited lacks expertise in a cognitive domain to which the conclusion belongs, the authority does not exercise its expertise in coming to endorse the conclusion, or the conclusion does not belong to a cognitive domain; otherwise the ad verecundiam is relevant.     

Classical rhetorical topics and contemporary historical discourse

This paper suggests a specific contribution of contemporary history and philosophy of science to the theory of history. The pragmatic in the technical sense of analysis of use and user aspects of scientific discourse, and the pragmatist, in the sense of a focus on utility as canon, dimensions of modern philosophy of science illumine the structure of historical inquiry. Simply put, the structure of writing produced by the historical discipline is argumentative. Further, the nature of the historical argumentative strategies is best described by reference to classical rhetorical, to topical modes of argument.     

The Role of Rhetoric in Rational Argumentation

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.     

Rules for argumentation in dialogues

In this article it is pointed out what kind of rules for communication and argumentation are required in order to make it possible to resolve disputes in an orderly way. In section 2, Gricean maxims and Searlean speech act conditions are integrated in such a way that five general rules for communication can be formulated. In section 3, starting from Lewis's definition of convention, it is argued that the interactional effect of accepting is conventionally linked with the complex communicative act complex of argumentation. In section 4, the rules for argumentation are placed in a dialogical perspective.     

Formal aspects of Legal reasoning

This paper discusses the functions of deductive justification in ideal reconstructions of judicial reasoning. It departs from the point of judicial reasoning: explaining and justifying the judicial decision. It argues that deductive validity is not enough for good judicial argument. On the other hand, deductive justification is necessary, not only for easy cases but for hard cases as well. It draws some consequences for the concept of jumps in legal reasoning and for the traditional distinction between internal and external justification.     

The Ancient Argumentative Game: τóπoι and loci in Action

In classical logic and rhetoric the strategies of argumentation known as topoi played a crucial role. Yet, topoi refer there to different kinds of strategies that this study intends to explain synoptically. Main focus will be on passages from Aristotle and Cicero. Indeed, these sources contain examples and theoretical considerations, which provide the basis for a general investigation of the complex phenomenon of topoi in the ancient world. Four main types of topoi will be juxtaposed and discusses comparatively as a way to inspire historical reconstructions of the system of topoi, as well as modern theory formation on argumentation where topoi still receive much attention.     

Subordinating Truth – Is <Emphasis Type="Italic">Acceptability</Emphasis> Acceptable?

Argumentation logicians have recognized a specter of relativism to haunt their philosophy of argument. However, their attempts to dispel pernicious relativism by invoking notions of a universal audience or a community of model interlocutors have not been entirely successful. In fact, their various discussions of a universal audience invoke the context-eschewing formalism of Kant’s categorical imperative. Moreover, they embrace the Kantian method for resolving the antinomies that continually vacillates between opposing extremes – here between a transcendent universal audience and a context-embedded particular audience. This tack ironically restores the very external mediation they thought to obviate in their aim to ‘dethrone’ the absolutism and totalitarianism of formal logic with a democratic turn to audience adherence, the acceptability of premises and inferential links, and a contextual, or participant-relative, notion of cogency.