not know A from a windmill

To be stupid. It references the vaguely similar shape of the letter A and a windmill. How do you manage to burn pasta? It's like you don't know A from a windmill.

Common Names:

Name	Pronounced	Usage
Hania (2)	-	Arabic
Aviya	-	Hebrew
Atlee	['ætli]
Roshan	-	Persian, Indian, Hindi, Marathi, Nepali
Vimal	-	Indian, Hindi, Marathi, Tamil
Kimbrough	['kimbrə]