As a data point: I have changed an editor's mind after a negative decision that was based on a referee's report that was demonstrably wrong. When I was an editor, whenever an author raised a potentially valid objection to a referee's report based on more than a difference of opinion, I made it a practice to seek other expert opinions, and change my decision if warranted. To misquote Orwell, one has the right to expect ordinary decency even of an editor.