Claudio Duran

The concept of deep disagreement was introduced by Richard Fogelin in a 1985 paper published in Critical Thinking. Since then, about 12 papers have been published in journals or presented in conferences on argumentation theory. All these papers relate back to the initial Fogelin paper. Andrew Lugg’s 1986 critical response to Fogelin introduces significant questions concerning his views. Peter Davson-Galle in 1992, takes a more positive approach to them. The more extensive publication on deep disagreement can be found in a 2005 issue of Critical Thinking dedicated entirely to this topic. Most of the 5 papers found here take a positive approach and introduce a challenging set of issues. Two papers presented later on, one in the 2007 OSSA Conference by Vesel Memedi, and the other one by David Zarefsky in the 2010 ISSA Conference, discuss the question of resolving deep disagreement. This proposed paper intends to draw specifically from the last two papers mentioned above, especially the one by Zarefsky, in order to introduce the notion of “levels of depth” in deep disagreement. Since Fogelin’s 1985 paper, deep disagreement seems to have been understood in rather absolute terms not allowing for differences in “depth” in cases of deep disagreement.

According to Bi-logic theory, there are two logics operating in the mind. One is traditional logic, and the other one is called “symmetrical”, because it does not respect asymmetrical relations. Bi-logic assumes that mental processes involve combinations of both logics in different proportions. From that perspective, Michael Gilbert’s theory of Multi-Modal argumentation is discussed focusing upon emotional arguments. It is claimed that these arguments are bi-logical, that is, they contain a combination of traditional and symmetrical logics.