 Like the treatises of the Tractatus kind, the Syncategoreumata were developed from the (twelfth-century) theories on fallacies, as well as from grammatical doctrines (from the same period). From the second half of the twelfth century, there was a growing interest in the linguistic elements that are considered to lie at the basis of ambiguity and fallacious reasoning. Hence the increase of treatises presenting a systematic account of these terms. The connection these treatises have with Priscian’s grammar can be gathered from the attention different authors pay to the signa quantitatis (or quantifiers), and the fact that considerable attention is given to the meaning and function of syncategorematic terms.