The logic of interdigitation

Abstract

This article focuses on the explanation of the intercalation (interdigitation) of vocalic patterns in Semitic consonantal roots. In particular, it compares my linear theory with McCarthy's nonlinear one.

While agreeing with McCarthy's notion of vowel ‘spreading’ for Arabic, it argues that McCarthy's theory does not actually explain the placement of vowel positions. My theory does explain placement, as this article shows by consideration of apparent counter‐examples, such as 3‐vowel verbs in Arabic and Amharic, and ‘broken’ plurals in Arabic and Tigre.