Unclear if question is genuine, but I would say that each level is capable of performing computations (and/or acting in the world) in ways which are inaccessibl

Unclear if question is genuine, but I would say that each level is capable of performing computations (and/or acting in the world) in ways which are inaccessible to other layers. I know saying 'things are hard' is an obvious conclusion, but that doesn't make it wrong!