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“Strong evidence for a genetic language ability comes from the observation that children who are not exposed to any speech, but are able to interact with each other, will invent their own language, which is complex in syntax and meaning. This has been seen in deaf children who were not exposed to sign language. Amazingly, as long as they had someone to interact with, they managed to communicate complex thoughts by inventing their own system of signing.” — John J. Ratey
Strong evidence for a genetic language ability comes from the observation that children who are not exposed to any speech, but are able to interact with each other, will invent their own language, which is complex in syntax and meaning. This has been seen in deaf children who were not exposed to sign language. Amazingly, as long as they had someone to interact with, they managed to communicate complex thoughts by inventing their own system of signing.