Being deaf and mute doesn't imply lack of language. But being unable to communicate absolutely strikes me as non-human.
Ok say you grew up alone in the woods, are you no longer human? The capability to learn language is no doubt unique, but language itself isn't the basis of intelligence.
Ok say you grew up alone in the woods, are you no longer human? The capability to learn language is no doubt unique, but language itself isn't the basis of intelligence.