We need to talk about Jeannie because the really awful, terrifying things that happened to that poor little girl taught us so incredibly much about language development in humans. So Jeannie was a little girl born to a very unwell family. She was the fourth child, but only the second living. So her mother was legally blind from neurological damage, and her father had a lot of mental issues. He. Didn't like noise. He didn't like hearing noise. So when the couple had their first child and it cried, he put it in the trash and it died of pneumonia at 10 weeks old. This sets the stage for the life that Ginny would lead. She has an older brother and then another child that died of some kind of blood incapability at birth. But the older brother still survived and he was lucky because his grandmother took him for a little while. And yeah, that is probably what saved his life, even though he was eventually given back to his family. Now the father was super abusive. Beat his wife, beat his son, beat his his daughter Jeannie. Beat them all. But when Jeannie was about 1 1/2 years old, her father started to get incredibly unhinged and he started locking Jeannie in a dark room all day, strapping her in a straight jacket to a child toilet for the entire day. He would only feed her baby purees and baby cereal and things like that, and would do so intermittently. She was very malnourished. And then at night he would take her off the child's toilet and strap her to a sleeping bag in a cot with a metal grate over the top. He didn't allow anyone to make noises in the house, so no one ever spoke to Jeannie. She never heard any linguistic input. She never heard anything. And if she made noises, she was beaten viciously eventually. At the age of 13 1/2, after being locked in a room for 12 years, Jeannie's mother was finally able to leave the house with her child, and social services figured out that there was something up and they rescued Jeannie. By the time doctors got to her, they tried to help her learn language, and unfortunately it was near impossible to get Jeannie to learn language the way that you and I speak it, the way that a child speaks it. She never quite acquired any kind of sophisticated language. She can say a couple of words, but not many, and she can't put them together in a very formal sentence. What this taught us, what Jeannie and this horrible experience taught us, was that there is a critical period of acquisition for language where a child's brain is open to the reception of language, but if it doesn't get it, the child will never learn. Formal language in their life. So there you have it, folks. Children require linguistic input, language, someone to talk to them before the age of seven at the very latest. But those early years are incredibly crucial. And the best way to teach your child language is to speak to them, is to have a conversation with them, even if you don't think they understand, and even if their response is to you is babble. Do Genie a favour and talk to your kids. as much as you can, all the time.