Do khipu encode narrative or language, or only quantity?

That khipu record numbers in a decimal positional system is settled and readable. Beyond that the field divides. Gary Urton argues that the binary structural choices available in the medium, in colour, spin, ply and attachment, give it an information capacity well beyond accounting. Others hold the cords numerical, with any narrative held in the specialist's memory and the khipu serving as a mnemonic prompt. Colonial testimony describing khipu specialists reading out histories and confessional records is compatible with both, because a skilled performance from a numerical prompt looks identical to a reading.