Abstract
A construction with epistemic value, sachant que is a discourse marker that covers both semantic-logical and discursive-argumentative values. Our paper sets out to follow the behaviour of this marker through a heterogeneous corpus, from the point of view of textual typology (literary texts, everyday discourse) but also in specialised language, and more specifically legal language (written and oral). The interest in analysing this marker lies in the fact that its uses, which are very frequent in contemporary French, tend to diluteitsinitialepistemic value,which refers to a known content shared by the enunciative instances. Our analysis follows the mechanism of weakening or maintaining thesemantic and argumentativeforce of this discursive unit through various types of discourse, in order to identify the correct use of the word in approprithrough various types of discourse, in order to identify the correct use of the word in appropriate contexts and with the appropriate meaning.