Here's why:
* Common nouns refer to general, non-specific things.
* Proper nouns refer to specific people, places, or things (like "Betty Crocker" or "King Arthur Flour").
Since "flour" refers to the general substance, it's a common noun.
Here's why:
* Common nouns refer to general, non-specific things.
* Proper nouns refer to specific people, places, or things (like "Betty Crocker" or "King Arthur Flour").
Since "flour" refers to the general substance, it's a common noun.