  The following letter, titled "Electron-Superconductivity in Oxides?", was
submitted to Nature [Scientific Correspondence Section] on March 2, 1989,
shortly after the experimental discovery of electron-doped cuprates announced
in Nature on January 26, 1989. It predicted the findings recently reported in
arXiv:1810.04634 by Yangmu Li, W. Tabis, Y. Tang, G. Yu, J. Jaroszynski, N.
Barisic and M. Greven that "clearly point to hole-pocket-driven
superconductivity in these nominally electron-doped materials", "reveal hole
superconductivity in the electron-doped high-temperature superconductors"
"after three decades of enormous scientific inquiry", and point to "a single
underlying hole-related mechanism of superconductivity in the cuprates
regardless of nominal carrier type". Many more papers on this topic were
published by F. Marsiglio and the author in the ensuing 30 years from 1989 to
the present. In omitting to refer to any of these theoretical works,
arXiv:1810.04634 presents a misleading picture.
