On the one hand is the argument that I choose resolved fluctuations based on what I am modeling, On the other hand, is the idea that this gives me a metric where atleast x% of proper DNS behaviour is resolved. So my metric must naturally converge to how I define things in that DNS limit, not in what I am modeling in the intermediate level, right? And on the DNS level, there is no modelled component, just the total velocity with all its intricacies. But we are bifurcating things at that level into mean and fluctuations, and then coming backwards. Where does this differentiation occur between mean and fluctuation?