Can somebody enlighten me on the rules here? If I, as an editor, find a reference to a reputable published source that says exactly the opposite of what another reputable published source cited and already contained in the article says, does anybody have the right to delete this opposite source, and if so, on what grounds, and if an edit war begins, which one is the third? Please don't now give me a lecture, just give me a plain answer? Be so kind?