It is by no means a clear-cut case. Some of the things reported by Marco Polo (e.g. paper money) were completely unknown in the west and middle-east at the time

It is by no means a clear-cut case. Some of the things reported by Marco Polo (e.g. paper money) were completely unknown in the west and middle-east at the time of his purported travels. He gets a remarkable number of things right, and fails to get certain other stuff wrong as one would expect of someone that hadn't actually visited the court of Kublai Khan.