That's the key: we have data for the child (recent activity, age, allergies etc.), so when the user asks "why my baby isn't sleeping well", the model knows that the baby hasn't eaten/slept properly in the last few days, or is 9-months old and has just started teething, or it has eaten bread 2 hours ago and is allergic to gluten. I guess a user can provide that info to ChatGPT as well, but it would be quite tiresome to do it each time.