AbstractThe current paper aims to explore the meaning of one of the most elusive discourse markers in Modern Greek rhetorical discourse:afu. To address the challenge of a thorough and parsimonious account, the relevance-theoretic model of meaning analysis is deployed. The analysis undertaken ultimately reveals that the marker at hand encodes procedural meaning in standard relevance-theoretic terms. However, unlike traditional relevance-theoretic approaches linking a marker to a single procedural function, the current one proposes thatafuencodes a poly-procedural constraint on the implicated content of the utterance containing the marker. Moreover, it is argued that this poly-procedural constraint is rhetorically exploited by the speaker in the interest of convincing argumentation.