 This is arguably in the same spirit as Chomsky’s description of the language faculty as “providing instructions” to performance systems (1995b: 15). Representations in the language faculty corresponding to elements of a grammar such as [voiced coronal sibilant], for example, do not stand for movements of the mouth (such as the one produced at the beginning of an utterance of the English word zebra), but they might nonetheless be part of the causal story of why a human moves her or his mouth in a particular way in particular circumstances.