your are neural networks are doing it's kind of useful for interpretability and it has interesting consequences for things like compression and for model Ensemble Inc and sort of all these papers including our own are interesting but I think there's a lot of scope for doing things in a more formal and a more principled way so although many of these methods are built off of sort of principle techniques a lot of the ways in which we apply them are indeed heuristic and we I don't think we can claim we fully understand their