  Ogburn et al. (2019, arXiv:1910.05438) discuss "The Blessings of Multiple
Causes" (Wang and Blei, 2018, arXiv:1805.06826). Many of their remarks are
interesting. But they also claim that the paper has "foundational errors" and
that its "premise is...incorrect." These claims are not substantiated. There
are no foundational errors; the premise is correct.
