Informal Logic 27 (2):179-196 (2007)

The paper calls for argumentation theory to learn from moral and political philosophy. Several thinkers in these fields help understand the occurrence of what we may call legitimate dissensus: enduring disagreement even between reasonable people arguing reasonably. It inevitably occurs over practical issues, e.g., issues of action rather than truth, because there will normally be legitimate arguments on both sides, and these will be incommensurable, i.e., they cannot be objectively weighed against each other. Accordingly, ‘inference,’ ‘validity,’ and ‘sufficiency’ are inapplicable notions. Further distinctive features of pro and con arguments in practical argumentation are explored, and some corollaries are drawn regarding evaluative norms of legitimate dissensus. Examples from immigrationrelated public debates in Denmark are given
Keywords argumentation theory, moral philosophy, political philosophy, dissensus, enduring dissensus, practical argumentation, Jürgen Habermas, Plato, Aristotle, John Rawls, Douglas Walton, logical dialogue games, burdens of judgment, stasis system, Isaiah Berlin
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References found in this work BETA

Political Liberalism.John Rawls - 1993 - Columbia University Press.
Political Liberalism.J. Rawls - 1995 - Tijdschrift Voor Filosofie 57 (3):596-598.
A Practical Study of Argument.Trudy Govier - 1985 - Belmont, CA, USA: Wadsworth Pub. Co..
Why Deliberative Democracy?Amy Gutmann & Dennis F. Thompson - 2004 - Princeton University Press.

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Rhetoric in Democracy: A Systemic Appreciation.John S. Dryzek - 2010 - Political Theory 38 (3):319-339.
Rhetoric, Dialectic, and Logic as Related to Argument.J. Anthony Blair - 2012 - Philosophy and Rhetoric 45 (2):148-164.
Argumentation as Rational Persuasion.J. Anthony Blair - 2012 - Argumentation 26 (1):71-81.

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