This article considers the Sravaisnava theologian Vedanta Desika's (14th-century CE) understanding of sabdapramana and deference to sabdapramana that is evident in one of his most important expositions the Tattvamuktakalapa and its commentary the Sarvarthasiddhi. For Desika, deference to sabdapramana is motivated by belief in a particular view of reality. This would be the acceptance of Visnu as the Brahman of the upanisads, his connection to authoritative scripture, and its propagation. Furthermore, to defer to sabdapramana requires membership in a community and the requisite pedagogical training that confers the authority needed to speak for the tradition.