Is using Posterize cheating?

[JosephCow]

My issue with that is that there's lots of different ways to posterize an image. It's not necessarily going to group the values in the best manner and that's not necessarily something you want to imitate. Nothing wrong with experimenting with it just to get an idea, but generally you want to make thise kinda of decisions about the relationships yourself. That being said, do whatever makes sense to you.