Dad: So you are not sick today?
Arne: Arne is not sick.
Dad: I always take care of you when you get sick. Will you take care of me when I get sick?
Arne: Humans are never sick.
Dad: But you are a human too..
Arne: I am not human, I am a boy
Dad: Boys are humans just as adults are humans.
Arne: Oscar and Peter are humans too. And Mum too
Dad: Yes, Oscar, Peter and Mum and you and me are all humans.
Arne: But babies are not humans
Dad: Babies are humans too
Arne: What about a chair?
Dad: A chair is not human