The internationally respected Chinese archeologist Chang Kuang-chih, former vice-president of the Academia Sinica, acknowledges that there are indeed many similarities between the ancient civilizations of Asia and the Americas. "But the very fact that the similarities are so numerous and so geographically widespread means that they do not look like the result of a chance contact. For me this makes diffusionist theories even harder to accept."
前中研院副院長，享譽國際的中國考古學家張光直，承認在亞洲與美洲的古文明之間的確有很多相似處，「但就是因為彼此的類似點非常多而且地點分佈廣泛，不像是偶然接觸的結果，才更認為傳播論的說法難以接受。」