I can't see the difference bewteen *very low quality* and *not an answer*. The flag descriptions are:

> 
> **it is not an answer**
> 
> 
> This was posted as an answer, but it does not attempt to answer the question. It should possibly be an edit, a comment, another question, or deleted altogether.
> 
> 
> **it is very low quality**
> 
> 
> This answer has severe formatting or content problems. This answer is unlikely to be salvageable through editing, and might need to be removed.
> 
> 
> 

I guess that an useful comment should be flagged as *not an answer*. But when the answer is just nonsense, is it *very low quality* or *not an answer*?

And how do questions get to the *low quality* queue, since there is no *low quality question* flag?