this okay and you can measure how long they stare at it and with how much attention and so that's how you know that a concept has been has been known on that we know if a concept is is violated by a particular scene that you show the baby the baby is going to be really surprised and you can measure the degree of surprise if you want so how is it that babies learned is just basically by observation you know young babies you know before a few months old or completely helpless I just observed and don't really have any way of affecting