Now that Eloise is in preschool, she knows things. And when she doesn't know things, then no one does.
Allow me to illustrate:
Me: How was Sam's soccer practice.
Eloise: Good. I met a friend. Her had a case here [points to arm] because her falled on the monkey bars at her school.
Me: Oh, you mean a cast. That's called a cast on her arm.
Eloise: Or case. We don't know. Nobody knows actually.