O＇Kelly　et　al.　critique　the　Wang　et　al.　undrained　shear　strength　prediction　model　paper　in　terms　of　its　utility　and　accuracy.　Both　criticisms　suffer　from　the　miscomprehension　of　the　model　comparison　method.　Utility　of　the　three-parameter　liquidity　index　(IL)-undrained　shear　strength　(Su)　models　has　been　enhanced　through　optimizing　some　empirical　equation.