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"The drama class had just gotten out, and everybody was standing around talking when Jessica noticed her 9-year-old, Isabelle, making her way over to an elderly woman Jessica had never seen. The woman was neatly dressed, most likely just a well-meaning suburban grandmother who had come to retrieve a grandchild on behalf of an over-extended parent, most likely a perfectly harmless person.
Isabelle, as she usually did, exchanged hellos and struck up a conversation. It was the usual post-drama-class conversation until about two minutes in. Then Isabelle dropped the bomb.
'Will you take me? Can I go home with you?' Jessica heard Isabelle plead.
Jessica's daughter, Isabelle, has Williams syndrome, a genetic disorder with a number of symptoms. Children with Williams are often physically small and frequently have developmental delays. But also, kids and adults with Williams love people, and they are literally pathologically trusting. They have no social fear. Researchers theorize that this is probably because of a problem in their limbic system, the part of the brain that regulates emotion. There appears to be a disregulation in one of the chemicals (oxytocin) that signals when to trust and when to distrust.
This means that it is essentially biologically impossible for kids like Isabelle to distrust."