  In our previous paper (Phys. Rev. D 94, 104030 (2016)), inspired by the work
of Allen and Turyn (Nucl. Phys. B 292, 813 (1987)), we expressed the graviton
two-point function in terms of maximally symmetric bitensors in de Sitter
spacetime. Quite contrary to the result of their work, however, we explicitly
showed that the de Sitter symmetry breaking is universal and the associated
infrared divergences cannot be gauged away. In this Letter, the origin of this
contradiction, which is greatly related to the well-known scientific dispute
about the infrared behavior of the graviton two-point function, is clarified.
