Origins, substance, and persistence of Romance morphomic patterns
This chapter reviews the evidence for the origins of morphomic patterns in the effects of defunct sound changes or extinct functional motivations and reflects on their substance and on the types of alternation involved, concluding that morphomic patterns exist independently of their phonological substance and that it is possible that any kind of formal difference (suppletion, defectiveness, heteroclisis, periphrastic structure, internal allomorphy) is liable to morphomic distribution. The chapter reasserts the crucial role of lexical identity in explaining morphomic structures in the face of formal difference. It invokes the principle of synonymy avoidance to explain speakers’ exploitation of morphomic patterns in the distribution of such differences. Finally, it considers the role of intraparadigmatic predictability in morphomic structure. Contrary to some current views, it argues that predictability is not an inherent property of morphomic patterns but an acquired property that favours the diachronic survival of morphomic patterns.