Um ... OK?

Foofie: We haven’t been dead for 51 days.
Mama: Oh? What does that mean?
Foofie: Well, it just doesn’t make any sense because we haven’t been dead for 51 days.
Mama: OK, but I want to know more about what you think about that.
Foofie: I just wanted to tell you that.  Guess what’s the biggest number? 99 is the biggest number.  Ah!  20 is the biggest number.
Mama: So is 20 bigger than 99?
Foofie: Yes! (wanders off to listen to Emma read “Caps for Sale”)

And there you have it, folks.