She doesn't think so or you don't think so?
Is it grammatically correct to respond with
to this question?
Or does this depend on the meaning intended to be conveyed with the answer?
Update: I don't know any more. It's just too confusing!
In this example, both can be used:
Neither => "neither one of those options is true".
Either => "one of those options is true; it doesn't matter which one you pick".