Is there a rule that states what word adjectives in a sentence will link to? If I say
I have a big cookie jar
it's still a correct sentence. The word "cookie" isn't an adjective, but "cookie jar" is a common term that represents a jar explicitly used to contain cookies.
In the phrases "dark green box" and "dark, green box" I know that with the comma, the box is dark and green, while without it, the box is dark green.
In the cookie jar sentence, is the jar explicitly used to contain "big cookies" or is the "cookie jar" big?