Final answer:
The phrase 'never not' contains a double negative, which is a grammatical error in Standard English. These mistakes often arise in mixed-construction sentences that can lead to unclear meaning. Dialects like AAVE have their own rules that differ from Standard English, such as omitting 'to be' or using 'been' in a specific way.
Step-by-step explanation:
An expression such as 'never not' is an example of a double negative. Double negatives occur in sentences where two forms of negation are used, but they cancel each other out, often creating a confusing or incorrect statement in Standard English.
This is sometimes done for emphasis in some dialects or languages, but in Standard English, it is considered a grammatical error.
Mixed-construction sentences are another issue where parts do not fit together due to inconsistencies in grammatical structure or meaning. For example, the construction 'just because... doesn't mean...' often leads to unclear and erroneously structured sentences when used in formal writing.
Diverse dialects, such as African American Vernacular English (AAVE), have their own grammatical conventions that differ from General American English. This includes the omission of the verb 'to be' or using 'been' before a verb to convey a past event that is still relevant, both of which are grammatically correct within the context of AAVE.