Put yourself in the kid's place: You don't know how to calm yourself, you don't know how to keep yourself warm, you don't know how to get around, you don't know how to get food. You are 100% dependent on people around you. The only thing keeping you alive is the goodwill of those people, and your ability to alert them to your problems. The default is no assumptions, just scream when there's a problem - assumptions are learned.