Soft fantasy worlds have a much looser cause-and-effect relationship. Alchemists can turn lead into gold and nobody wonders about how it will impact the currency system. Someone waves a wand and turns an elephant into a mouse and nobody worries about conservation of mass.
Patrick RothfussI've got an idea for a modern day faerie tale that I think would made a great short novel. But I just don't have the time to work on it right now. I'm way too busy with the 'Kingkiller Chronicles' and being a new dad.
Patrick RothfussI've got a solid grounding in history, sociology, anthropology, philosophy, etc etc. That means I actually have a good idea about how societies change and evolve. I know how a lot of them have actually functioned through the years. I can put together a culture that's cool and different, while still being logically consistent, so that it feels real. So many fantasy worlds are either implausible, cookie-cutter, or both. Mine aren't.
Patrick Rothfuss