"And this is the case here . Language skills , in case you missed them must be learnt at a specific age - or you 've missed the boat . Cave-man may have come up with words for 'fire ' 'water ' and 'air ' etc , and teach these to his cave-kids , but he would have had to have been taught complex language skills as a child in order to pass these on to his cave-kids . The cases of the 'wild-children ' show that even with a normal brain and the best of scientific and social help , they ca n't acquire these skills in their own life time ... because they 've missed the boat ."
"So the simpler proto-languages had to be learned at an early age , too . So what ?"
"The cases of the 'wild-children ' show that even with a normal brain and the best of scientific and social help , they ca n't acquire these skills in their own life time ..."
"So what ?"