Imagine being tasked to design a house but not having any specific reference about the components you can use to create an actual structure. You have a general understanding of buildings as enclosed spaces with walls that form different functional areas, but no specific concept or definition of components type like bedrooms, offices, kitchens or bathrooms. No definition of even smaller blocks such as corridors, stairs, windows, doors or how they connect and relate to each other. You have to figure all of that from first principles. Quite a task!