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
Augustyna	ow-guws-TIN-ah	Polish (Rare)
Mahmut	-	Turkish
Hywel	-	Welsh
Iulianus	-	Ancient Roman
Aaron	AR-ən (English), ER-ən (English)	English, Jewish, Biblical, Biblical Latin, Biblical Greek
Quianna	-	African American (Rare)