Apply df_ifs__df_cgr3__df_fs__df_segle__df_outsideof__df_line2__df_ray__df_lines2__df_fwddif__df_fwddifn__df_hf__df_fne__df_3nand__df_gcdOLD__ax_prv1__ax_prv2__ax_prv3__df_ssb with
∀ x0 : ι → ο . ∀ x1 . wb (wssb (λ x2 . x0 x2) x1) (∀ x2 . wceq (cv x2) (cv x1) ⟶ ∀ x3 . wceq (cv x3) (cv x2) ⟶ x0 x3).