We don't need a list of rights and wrongs, tables of dos and don'ts: we need books, time, and silence. Thou shalt not is soon forgotten, but Once upon a time lasts forever.
If I'm reading something I happen to know and gets it wrong, I just don't trust the book any more. What I ask of a novel I'm reading is that it should know a fraction more about the things I know than I do. When I'm writing...I ask myself: would I be convinced by this if I read it? If I knocked against this bit of scenery, would it feel solid?