I have a couple of negatively voted questions and I'd like to bring them to a non-negative score total.
The question ban help page implies that this is possible for every post, but I've received contradicting information on a meta question about a specific one.
Edit all of your questions, paying special attention to those that score 0 or less.
(Emphasis mine).
I don't want to clutter the meta with questions for which a more experienced user would find no way of improving, so I first want to clarify this:
Hypothesizing the ideal edit for each post, could they all reach a zero or positive score, even if they started as duplicate or not sufficiently researched?