thinking about it but sometimes we over fit to what kind of these papers say all right so don't want to say it's not always true but it's a useful way of thinking about it another way that this one ends up sometimes is presented this is how I learned it not everybody possess it this way is that you decompose is this it's it's the same same proof though it's you did you put the error it's three parts right so there you compare your error of your estimator versus the error the best thing in that in the class of stuff