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