 The use of probability-related terms was almost certainly wider than the concepts of probability listed above suggest. In philosophical and theological debates, as well as in the regulation of action, probabilis could be used as a predicate for the argumentative support which a proposition had (translatable as “plausible” or “rationally tenable”). In the early modern era, this aspect of medieval probability became explicitly integrated into the definition of a probable opinion (Knebel 2000; Maryks 2008; Schuessler 2019; Tutino 2018). It was not, however, expressly addressed in medieval and, in particular, scholastic characterizations of probability. Here, the focus will be on such characterizations in medieval sources. 