For example, take my truck. “Truck” is a new layer of description for the vehicle with open space to haul stuff and which is made up of a six-cylinder engine, radiator and cooling systems, chassis, and so forth. Now that I have a new description, every time I think about or refer to my truck, I don’t have to refer to all the parts and assemble them in my mind. I don’t have to think of them at all (until something goes wrong with one of them). We can’t deal with all the underlying complexities present in understanding the mechanisms of things every time we refer to them. It’s too much for our mental processes to handle. So we chunk it—give the mechanism a name, “truck,” thereby reducing its load on us from thousands or millions of items to one.