Pragmatic competence, autistic language use and the basic properties of human language

The unique linguistic profile of autistic people urges linguists to address the divergences in human language, its acquisition and use among major linguistic perspectives. Fitting with the dual roles of language (thought and communication), this paper adopts an internal pragmatic competence (IPC) and a (similar) pragmatic competence for external communication (PCEC) to elucidate how autistic linguistic profile discloses the divergences between nativism and constructionism on language use and acquisition (ultimately language proper). IPC justifies why autistic people resort not to mind-reading but to self-sufficient mental interactions among organism-internal submodules or nearly intact grammatical subsystems when abstractly processing linguistic and communicative needs, contra constructionists' assumption of sole intersubjective language use. PCEC, required for facilitating the authentic intersubjective language use, explains how the dysfunction of modular interactions and their interactions with outside contexts leads to autistics' sociopragmatic impairment and the double empathy gap. In this way, the divergences, along with the possible reconciliation between the two perspectives, can be expounded.