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
Izudin	-	Bosnian
Muir	-	Scottish
Zurab	-	Georgian
Cherryl	SHER-əl, CHER-əl	English
Leela	-	Indian, Hindi, Telugu, Kannada, Tamil, Malayalam
Raginmar	-	Ancient Germanic