The best example I'm aware of is Nicaraguan Sign Language [1]. > Steven Pinker, author of The Language Instinct, claims that "The Nicaraguan case is absolutely

The best example I'm aware of is Nicaraguan Sign Language [1]. > Steven Pinker, author of The Language Instinct, claims that "The Nicaraguan case is absolutely unique in history ... We've been able to see how it is that children—not adults—generate language, and we have been able to record it happening in great scientific detail. And it's the only time that we've actually seen a language being created out of thin air." [1] https://en.wikipedia.org/wiki/Nicaraguan_Sign_Language https://en.wikipedia.org/wiki/Nicaraguan_Sign_Language