Of course the theory is mine, I guess I didn't make that clear. I only posted to see a rebuttal, not just a rejection.
Also, perhaps I wasn't clear that I wasn't talking about feral children, there have been one or two fairly documented cases and they cannot learn language if they have missed the window of opportunity, which is about 2 to 5 years.
But I'm talking about children, twins or close siblings that are raised in an orphanage, or by inattentive parents. They tend to develop what is called cryptophasia, this has been fairly well studied.
Also, perhaps I wasn't clear that I wasn't talking about feral children, there have been one or two fairly documented cases and they cannot learn language if they have missed the window of opportunity, which is about 2 to 5 years.
But I'm talking about children, twins or close siblings that are raised in an orphanage, or by inattentive parents. They tend to develop what is called cryptophasia, this has been fairly well studied.