Validation of the analytic geometric scaling for oblateness detectability. Each point shows a simulated configuration for a Jupiter-like planet transiting a 0.60 R_⊙ star, plotted as the oblateness-model preference Δχ² vs. the combined geometric predictor ﹩{F}^{2}/\sqrt{1-{b}^{2}}﹩, where F ≡ F(f_⊥, θ_⊥, b) is the dimensionless ingress–egress asymmetry factor. Points are colored by impact parameter. For nongrazing and noncentral transits, Δχ² increases approximately linearly with the predicted scaling. The relation breaks down for central transits, where the ingress–egress asymmetry is suppressed, and for grazing transits, where finite-planet-size effects reduce the asymmetry. For this system, these regimes occur at b ≲ 0.17 and b ≳ 0.83, indicated by the markers on the color bar.