Kepler-419. Top panel: χ² vs. period ratio (N_dof  =  29). The 678 day solution is far superior to all other solutions. Second panel: TTVs measured by R. I. Dawson et al. (2014). The red curve shows the best variant of the P_c  =  678 day solution (R. I. Dawson et al. 2014). The red curve shows the 1:3 solution (P_c  =  24 days), which is second-best. Third panel: residuals of the 678 day solution (rms  =  0.4 minute) and the 1:3 solution (rms  =  8.9 minute). Fourth panel: TDVs and predictions of the 678 and 24 day models. Both models predict little variation, but the 678 day model provides a better fit. It seems safe to conclude that Kepler-419’s TTV solution is unique.