The purpose of this paper is to analyze the structure and the defeasibility conditions of argument from analogy, addressing the issues of determining the nature of the comparison underlying the analogy and the types of inferences justifying the conclusion. In the dialectical tradition, different forms of similarity were distinguished and related to the possible inferences that can be drawn from them. The kinds of similarity can be divided into four categories, depending on whether they represent fundamental semantic features of the (...) terms of the comparison or non-semantic ones, indicating possible characteristics of the referents. Such distinct types of similarity characterize different kinds of analogical arguments, all based on a similar general structure, in which a common genus is abstracted. Depending on the nature of the abstracted common feature, different rules of inference will apply, guaranteeing the attribution of the analogical predicate to the genus and to the primary subject. This analysis of similarity and the relationship thereof with the rules of inference allows a deeper investigation of the defeasibility conditions. (shrink)

One of the positive ways in which argumentation can improve political thinking is through providing definitions. We can establish definitions through argumentation, filtering out ideas that are irrelevant or unacceptable, and collecting features that offer a comprehensive understanding of a crucial concept. In this paper, we use argumentation to illuminate the concept of extremism. We proceed in this way: first, we discuss the relationship between argumentation and definitions. Second, we look at the current state of affairs by exploring contemporary definitions (...) of “extremism” and by identifying several problems in the definition literature. Third, we assume the burden of proof in providing a definition that avoids problems we have identified. Fourth, we discuss other closely-associated concepts and their definitions—terrorism, radicalism, and fundamentalism, explaining how these concepts are distinct from our definition of extremism. (shrink)

Of the different modes that characterize Michael Gilbert’s multi-modal theory of argumentation, the kisceral is in many ways the most challenging to understand and employ. It appears to bypass the processes of reason that have dominated accounts in the Western tradition, diverting us toward the private worlds of hunches and gut reactions. This paper explores the nature of kisceral arguments, comparing them to the way intuition operates in William James’ examination of mystical experience. Having provided an account of kisceral arguments (...) and their operation, the discussion turns to the even more challenging issue of how such arguments should be evaluated. (shrink)

Of the different modes that characterize Michael Gilbert’s multi-modal theory of argumentation, the kisceral is in many ways the most challenging to understand and employ. It appears to bypass the processes of reason that have dominated accounts in the Western tradition, diverting us toward the private worlds of hunches and gut reactions. This paper explores the nature of kisceral arguments, comparing them to the way intuition operates in William James’ examination of mystical experience. Having provided an account of kisceral arguments (...) and their operation, the discussion turns to the even more challenging issue of how such arguments should be evaluated. (shrink)

Built in the centre of Copenhagen, and noted for its equestrian stairway, the Rundetaarn (Round Tower), was intended as an astronomical observatory. Part of a complex of buildings that once included a university library, it affords expansive views of the city in every direction, towering above what surrounds it. The metaphor of the towering figure, who sees what others might not, whose vantage point allows him to visualize how things fit together, and who has an earned-stature of respect and authority, (...) fits another Danish stalwart, Hans Vilhelm Hansen, whose contributions to the fields of informal logic and argument theory have earned the gratitude of his colleagues, and inspired this collection of essays, written to express the appreciation of its authors and of the many, many colleagues they represent. (shrink)

We deeply mourn the sudden and completely unexpected death of our friend and colleague on 3 January 2020, a gentle and unassuming giant in the fields of informal logic and argument theory.

Of the different modes that characterize Michael Gilbert’s multi-modal theory of argumentation, the kisceral is in many ways the most challenging to understand and employ. It appears to bypass the processes of reason that have dominated accounts in the Western tradition, diverting us toward the private worlds of hunches and gut reactions. This paper explores the nature of kisceral arguments, comparing them to the way intuition operates in William James’ examination of mystical experience. Having provided an account of kisceral arguments (...) and their operation, the discussion turns to the even more challenging issue of how such arguments should be evaluated. (shrink)