This article revisits the pecheuxtian notion of interdiscourse to argue for its contemporary relevance and analytical productivity. Interdiscourse is conceived as a "complex whole with a dominant" of discursive formations, structured by contradiction, inequality, and subordination, through which meaning is materially produced in intradiscourse. The paper proposes a theoretical-methodological device that articulates interdiscourse, discursive memory, and forgetting, showing how the interpellation of the individual as subject operates via identification with the dominant play of FDs, thereby sustaining evidential effects of meaning and the illusion of authorship. By means of this device we were able to read the parafrastic shift between two governmental slogan/brands – "Governo Federal – Brasil União e Reconstrução" (2023) and "Governo do Brasil, do lado do povo brasileiro" (2025) – in order to expose the role of state ideological apparatuses in regulating and disseminating evidences of meaning. The analysis details three interdiscursive mechanisms: (1) the pre-constructed effect; (2) the sustaining effect; and (3) the transverse-discourse effect. We conclude that the actuality of interdiscourse remains a condition of possibility for discourse analysis, since the analysis of its mechanisms is what allows us to analyze the struggle/dispute over signifying/interpreting, in this article, the same statement.