go that that is so let me talk about sort of nicely smooth those conditions here I mean on the distributions so let me let me sort of move on to how we want to use this so I guess you know part half the talk is like here's a model that sort of sits on some knife at knife edge of tractability and still capturing a bunch of effects that are important I've already pointed out to you at least five or six different ways that I think you would want to do things to the model to capture effects that are that are important in practice that said at least