– We propose to use Ludics as a unified framework for the analysis of dialogue and as a reasoning system. Not only Ludics gives a denotational semantics for Linear Logic, but it uses interaction as a primitive notion. We first sketch a model for pragmatical and rhetorical aspects of dialogue after a brief review of the way the interactive aspect of dialogue may be represented in Ludics. Then we show how taking into account inferences that occur during a dialogue, with respect to a ISU-like model of dialogue. Through various examples we give an analysis of deductive inferences as well as processes making facts explicit that take place during knowledge updating.