Presupposition and Dissociation in Discourse : a corpus Study

This paper combines different theoretical and methodological approaches for the analysis of discourse, focusing in particular on argumentative structures. At a first level an attempt is made to include argumentation in critical discourse analysis in order to extend the analysis of interaction between “structures of discourse” and “structures of ideologies” (van Dijk 1995) to higher levels of language description. At a second level the study will integrate the qualitative approaches of critical discourse analysis and argumentation theory with the quantitative tools of corpus linguistics, so that the analysis can be carried out on a representative amount of texts and in a more systematic way. Even though corpus linguistics tends to be focused on meanings localized at the level of words, while argumentative structures stretch out through longer units of text, an integration can be attempted by circumscribing the enquiry to those aspects of argumentation which are signalled by indicators, and are therefore electronically retrievable. In particular, this paper investigates the use of dissociation and presupposition in a corpus of newspaper articles published in the run up to the war on Iraq. Both structures respond to retrievability criteria while being powerful instruments to convey ideologically oriented messages.