2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2680Based on a proper motion survey, Oppenheimer et al. claim the detection of a white dwarf component of the dark matter of the halo. I show that most of the white dwarfs in their sample are likely disk white dwarfs which have been previously detected, and represent no new population.500 words, published as a Technical Comment to ScienceAstrophysicstext