  This note is a response to [7] in which it is claimed that [13, Proposition
11] is false. We demonstrate here that this assertion in [7] is false, and is
based on a misreading of the notion of set membership in [13, Proposition 11].
We maintain that [13, Proposition 11] is true.
  ([7] = arXiv:1809.00593, [13] = arXiv:1512.07797)
