Comment on "Permanent human occupation of the central Tibetan Plateau in the early Holocene".

Meyer et al (Reports, 6 January 2017, p. 64) claim that permanent human occupation of the central Tibetan Plateau started in the early Holocene without the support of an agropastoral economy. By careful examination, we find that neither the archaeological evidence nor the travel cost modeling provided by Meyer et al could support the permanent human occupation assertion.