each other you know things like that which is of course super important for ticks like drug design I was at Harvard a couple weeks ago and I talked to people who are trying to use neural nets to predict the property of certain solids so if you take graphene which is a two-dimensional mesh of carbon atoms and you take two and it's cool you know just a single atom thick layer you take two layers of graphene and the one on top you twist it just a little bit compared to the the one at the bottom there's a particular