This paper examines semantic vagueness agency in discourse, and the link between deontic modal meaning and third person reference via the semantics and application of the Finnish jussive mood. Exploring Finnish jussive forms that evoke diverse modal readings, it is asserted that both permission and obligation are concurrently extant, yet to diverse degrees, in jussive clause interpretation, a binary nature which appears a discursive resource, possible rendering more than one viewpoint, and adding to language's dialogical aspect. The employed examples stem from a set of newspaper texts and a dialectal speech corpus.