You're so happy that your previously mostly silent child is now talking quite a bit. Where, until recently there had only been grunts and one-word answers, now there are whole sentences, often offering what seems to be profound insights on life. It is only later, when you recognise the same turn of phrase, the same expression or the same accent, that you realise that all this time, he's been quoting from movies and TV shows. You feel cheated and your first impulse is to stamp it out. The question is; should you? This condition is called echolia and it's very common in children and adults with Asperger's syndrome. There are many books and specialists who say "yes", very strongly "yes", you should stamp this behaviour out. It's even suggested by some of the most progressive writers in the field. I say no. In fact, I'm completely stunned by some of the people saying yes and it's led me to think that perhaps Echolia isn't a...