120 grit sandpaper is 120 grains of sand per square inch. I wonder who counts it. A Use the time to build many things with step by step instructions. If we can agree that 'own ideas' are probably derivative ideas, I will agree. Almost building from plans though they are my own.
Nothing is pure in the sense of being independent.
Of course an article is not a textbook. There is a tv show here called New Yankee Workshop that is a half hour how to build a piece of furniture. It usually involves making a reproduction of some piece of furniture from the past. Well it is difficult to argue without concrete examples. At the end my arguments are highly subjective.