ABSTRACT
W hen evaluating argumentative discourse, fallacies in the dis-course must be detected. Fallacies are violations of the rulesfor critical discussion that prevent or hinder the resolution of a difference of opinion. They can occur during any of the discussion stages and can be committed by either party. In the presentation of standpoints and arguments, the following moves are among the fallacies that may threaten the resolution process: (1) putting the opponent under pressure or attacking him personally (violation of freedom rule), (2) evading or shifting the burden of proof (violation of burden-of-proof rule), (3) setting up a straw man (violation of standpoint rule), (4) using irrelevant argumentation or rhetorical tricks (violation of relevance rule), and (5) denying or magnifying an unexpressed premise (violation of unexpressed premise rule).
