In this world of rocks and trees and skies and filled with many sorts of things there are certain objects which contain within themselves a shadowy double of the world together with a complex and evolving mass of abstract contents closely tied to this double and which imperfectly dictate the behaviours of said object. Isn't the picture something like this? These abstract contents do a pretty good job of modeling and predicting the parts of the world that don't include any behaviours akin to themselves and a progressively worse job when it comes to modelling and predicting behaviours more like their own, including their own behaviours as much as those of certain other objects deemed to be of the same type. Actually, there is only the shadowy double, which isn't the double of anything, and there are parts of it which model so well, so reliably, that they are taken to be the basis for everything else and a tireless striving to subsume the parts that are poorly modeled into the parts that are well modeled. Although this striving always falls short it is repeated incessantly and in many different ways.