> don’t need to have anything to do with the outside world I'd take that a step farther - if they do, that's probably a sign that you're taking things too lite

> don’t need to have anything to do with the outside world I'd take that a step farther - if they do, that's probably a sign that you're taking things too literally. They probably _shouldn't_ have anything to do with the outside world. I die a little inside every time somebody introduces inheritance with that stupid Dog extends Animal example.