Japanese People expression

So I’ve been stumbling with Jin Nin on Master-Enlightened as I just forget it and I end up just guessing the Jin or Nin. However I just read this from a post about this: == This has been brought up a few times before. Someone pointed out that quite often ‘jin’ is used for words where there’s more of a sense of permanence, and ‘nin’ for things that are more temporary. This isn’t totally reliable but I’ve found it’s a good rule of thumb. So for example, things like アメリカ人 (American person) or...