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A recent preprint by Wang and Unruh [arXiv:1911.06110] contains a number ofcriticisms of my paper, "Hiding the cosmological constant" [Phys. Rev. Lett.123 (2019) 131302, arXiv:1809.08277]. While Wang and Unruh suggest aninteresting alternative scenario and raise an important conceptual question,most of their criticisms are incorrect, in part because of misunderstandingsabout averaging and about the nature of the "foamy" spacetimes considered in mypaper.

A comment on "How the cosmological constant is hidden by Planck scale curvature fluctuations''