Isn't it obvious?

Miri was explaining to Mommy on the way home from school the other night that her friend Nicholas was not at school that day.

Miri:          Yeah, he wasn't dere. He went to Navania.
Mommy:    He went where, honey -- Pennsylvania?
Miri:          No, Navania.
Mommy:    Do you mean Nevada?
Miri:          No, I mean Navania, just like I said!
Mommy:    Honey, there is no such place as 'Navania.'
Miri:          How would you know -- you've never been there!