Abstract

IT IS CERTAINLY THE CASE that twelfth- and thirteenth-century treatises on logic represent in great part attempts to represent the Organon, Aristotle’s books on logic, by rearranging the material, adding clarifications, and sometimes breaking new ground as in the case of the treatise on the property of terms. Thus when Roger Bacon is writing his Summulae dialectices around 1252, he is confronted by the problem of what to do with the material on the classification of statements into single or multiple, and simple or composed in chapter 5 of Aristotle’s On Interpretation. There, apropos of the two divisions and interspersed among other claims, we read the following