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 Conf...