Re:I he is right (Score 1)

Well, I'll just have to put a good word for Prof. Urton here. I most definetely wouldn't consider him a "wacko" (though I admit to being a khipu nut so my objectivity may well be questioned). He has worked on deciphering the khipu quite persistently for a couple of decades now from anthropological, archeological and ethno-mathematical angles.

Check out this article in the Harvard Gazette.