Torus

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Loops can be considered as sets or spaces more closely than other kinds of lists because every item is geometrically indistinguashable - none are the start or end, there's no center, inside or outside. In geometric terms all the points of the loop form the surface of a 1-sphere.

The loops actually form a hierarchy since each item in a loop can also be a loop. Geometrically this forms a recursive torus - a torus is a circle where all the points composing the circumference are also circles.

There is a concept or order, and the concept of matching combine in execution...