Age dependence of the Splash-to-thick-disk number ratio under our merger-ejection toy model. The green dashed line marks the adopted merger time at 10.5 Gyr. Assuming that 10% of thick-disk stars are transferred into the Splash population during the merger, we estimate the Splash/thick-disk fraction in each age bin by Monte Carlo resampling the stellar ages 1000 times according to their age uncertainties. The blue solid line shows the median ratio, and the blue shaded region indicates the 16th–84th percentile range.