As our minds grow stronger and our experience increases, we seek artifacts that are more abstract for they are more unique as vessels for larger quantities of experience. In this same vein, abstraction helps us to better understand the differences between everyday artifacts and the great human artifacts. They differ in abstraction, in the quantity of experience they can hold. Of course, they must be finished, and they must be complete. The difference in abstraction is thus the difference in uniqueness.
Abstraction is a measure of uniqueness.
These elements of knowledge are also the greatest abstractions that we have. And it is of great interest that our most powerful abstractions should only come in these few forms. At its most fundamental, abstraction must then not continuous. It must have discrete levels. We build abstraction on the broadest scale in large and singular steps.