I was told " flags should not be used to indicate technical inaccuracies, or an altogether wrong answer" and then I found Don't flag wrong answers?
A claim here made by a user named Neal, asked about here (where I ask about the definition of "local diffeomorphism onto image"), is that immersions are "local diffeomorphisms onto images". If we read "local diffeomorphisms onto images" as "local-(diffeomorphisms onto images)" rather than "(local diffeomorphisms)-onto images", then this is correct because diffeomorphisms onto (submanifold) images are equivalent to embeddings, and immersions are equivalent to local embeddings.
This answer by Neal neither defines "local diffeomorphisms onto images" nor proves how immersions are "local diffeomorphisms onto images". Two users, a user named Arrow and I, have already tried to ask clarification from Neal, but Neal has not responded.
Neal's answer has 6 upvotes and yet is potentially wrong under a different definition of "local diffeomorphism onto image". (I think "local diffeomorphism onto image" should be different from "local embedding". Otherwise, "local diffeomorphism onto image" is kind of redundant.)
Also, I have asked similar questions to two commenters who claim similarly to Neal here, but the commenters have not answered my similar questions. But these are just comments and not answers.
What in general should one do when an answer is potentially wrong, when there are comments made about these potential errors, when the downvotes do not exceed the upvotes and when the one who answers does not address the potential errors? Could be this, but you'd have to be specific please.