I might be young but I ain’t stupid

We were listening to the radio on the way home from the Sponge Bob movie last night (not very good btw), and had this little exchange.

me: She says “I might be young but I ain’t stupid” but that sounds pretty stupid when you say it that way right?

Jack: Yeah.

me: (jokingly) She should say “I might be young but I am most certainly not unintelligent”

Jack: She’s young but she’s not Shakespeare mom!!!