%0 Journal Article %T Comment on ``Parton distributions, d/u, and higher twist effects at high x'' %A W. Melnitchouk %A I. R. Afnan %A F. Bissey %A A. W. Thomas %J Physics %D 1999 %I arXiv %R 10.1103/PhysRevLett.84.5455 %X In a recent paper Yang and Bodek extracted the free neutron structure function at large x by extrapolating the density dependence of the nuclear EMC ratios to the deuteron. We clarify why this approach is ill-defined for light nuclei, and introduces a large theoretical bias into the extraction of F_2n at large x. %U http://arxiv.org/abs/hep-ex/9912001v2