  A recent preprint arXiv:1807.08572 reported the observation of a transition
in Ag/Au nanoparticle composites near room temperature and at ambient pressure,
to a vanishingly small four-probe resistance, which was tentatively identified
as a percolating superconducting transition. In this brief comment, I point out
that a vanishing four-probe resistance may also emerge in non-superconducting
systems near conductance percolation threshold.
