Light curve and model for KMT-2018-BLG-2718. The anomaly is a dip near the peak, which is flanked by two bumps. This morphology is the classic signature of the planet/binary degeneracy identified by Han & Gaudi (2008) (see insets). In this case, the planetary interpretation is favored by Δχ² = 12.7. The invariant parameter t_q = qt_E = 3.16 ± 0.16 days would imply non-planetary mass ratios (by our definition, q > 0.03), unless t_E ≳ 100 days. In fact, the fits imply much longer timescales (see Table 9).