Claim: South Slavic languages, which is one of four branches of the Slavic languages, are not exclusive and distinctive from Eastern and Slavic languages because the South Slavic language did not experience any political or cultural unity.
Evidence: The South Slavic languages are one of three branches of the Slavic languages. Furthermore, Matasović argues, there was never a period of cultural or political unity in which Proto-South-Slavic could have existed during which Common South Slavic innovations could have occurred.