This is compounded by the fact that the related articles all perpetuate the same errors. For instance the Encarta 95 article on the Aymara claims the Aymara were the last people to be subdued by the Incas whereas Garcilaso de la Vega tells us the Aymara were the first people the Incas worked with when they founded their empire in 1100 AD. While it is true that towards the end of the empire the Aymara turned on the Incas and were subsequently subdued, the article denys the long standing close relationship between these two peoples, making it appear the Aymara were latecomers to the Inca empire. This in turn, attacks all memory of the empire's rigid cast system in which the Quechua were at the bottom. It is hard to claim to be a Royal Inca when you are knowingly at the bottom of the Inca cast system.

Most, but not all, of these discrepancies can be reconciled by discriminating between the rulers and the ruled.