Knots are a wonderful device to use for remembering things.Since the Incas didn't have a written language there is speculation among some scholars that knots or quipus (khipu) were used as their form of writing. Some say it was used for accounting purposes. Maybe a bit of both. It's been speculated that information was formed by using a set of binary choices to convey details. Using sequences of knots and colors to record information.More about these theories can be found at this link:String, and Knot, Theory of Inca Writing
The Inca society must have had a prolific memory system.
Incas enjoyed their own version of a core society. A ruling class. Knowledge was tightly controlled.
Core society feeds on periphery society. Just like a Shepard over his sheep.
Elites gather all periphery material and built a structure that would harness all power for itself.
Oral histories/used mnemonics - knot mnemonics (a form of writing?) - non linear - hierarchical linking - each zone of influence has its own version of history - this controls access to information. The most learned have the most ethos. Using ethos to sell ideas and beliefs.
Until the Spanish came and replaced the core society with their own version.
Written histories enjoy linear cause and effect type of inquiries. Incas didn't seem to view time in the same fashion.