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
Vivienne	-	French
Emilio	e-MEE-lyo (Italian, Spanish)	Italian, Spanish, Portuguese
Olavi	O-lah-vee (Finnish)	Finnish, Estonian
Tim	TIM (English, German, Dutch, Slovene)	English, German, Dutch, Slovene, Swedish, Norwegian, Danish
Lillia	LIL-ee-ə, LIL-yə	English
Vienne	-	French