Anthropologists successfully decoded khipu,the knotted strings used by the Incas as a writing system demonstrating that it was an actual written language and not an accounting system.

Question

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While some researchers believe khipus may contain more information than just numerical data, there is no consensus that they have been fully decoded to demonstrate a complete written language. Khipus are primarily understood as a complex system for recording numerical and possibly some non-numerical information, but the full extent of their use remains a subject of ongoing research and debate.

Anthropologists Successfully Decoded Khipu,the Knotted Strings Used by the Incas