International audienceABSTRACTStarting from the observation that the notion of presupposition has given rise to only a few rare historical studies questioning the conditions surrounding its emergence and the stability of its conceptual content, this paper examines the hypothesis that the medieval doctrine of exponibilia played a key role in highlighting this notion. After explaining the method of analysis of the so-called exponible propositions and drawing up a typology of these grammatically simple yet semantically complex propositions, the article first points out that all the families of exponibles do not contain presuppositions. As a result, the correlation is necessarily weakened between this doctrine and the bringing to light of the p...