Another sign language developed in isolation that linguists love to study is Nicaraguan Sign Language: https://www.wikiwand.com/en/Nicaraguan_Sign_Language http

Another sign language developed in isolation that linguists love to study is Nicaraguan Sign Language: https://www.wikiwand.com/en/Nicaraguan_Sign_Language https://www.wikiwand.com/en/Nicaraguan_Sign_Language The core claim of the title, that somehow non-decomposable sign language goes counter to something doesn't match anything I've ever heard in linguistics. Many signs in ASL are fairly representational as well.