Lens strong lensing bias in the case of a magnification-based lens definition (brown curves), compared to that of the fiducial analysis (blue curves). First panel: median log α_sps. Second panel: median M_DM, 5 at log M_* = 11.5 and log R_e = 1.2. Third panel: median γ_DM at log = 11.4 and log R_e = 1.2. Fourth panel: median axis ratio. Fifth panel: median mass-sheet transformation parameter, defined in Appendix C. In each panel, the dashed line indicates the value of the parent population.