Writing question: trustworthy narrator?|
I've seen that sort of thing done once, though in somewhat different circumstances. The reader knew a character (A) by one name, then another character (B) referred to character A by another name. My first thought was that there had been a proofing error (author/editor decided to change character name and overlooked it in this one spot), but shortly the reader understands why character B did that, and then it's okay from there on. I don't think it makes the narrator untrustworthy, unless there are also other things that the narrator "knows" but keeps secret from the reader.