No learning on Thursdays

Jack: How did you like school today?  What did you do?
Brianna: We learned new things.
Jack: That's your answer, "We learned new things."?
Brianna: Oh, wait, no, today was Thursday.  We don't learn anything new on Thursdays.
Jack: Ha ha.
Brianna: No really, on Thursdays we just review.

[The funny thing was, she was being serious.]