Apply unknownprop_f8517820c41e80abae5090668a4d7f9c31465f066f11281cc9990a74d008bfa1 with
λ x0 : ι → ι . λ x1 . x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 x1)))))))))).
The subproof is completed by applying unknownprop_ed572293a6fa0ec02a803cad7d3df6b0e0146a679954f245b5255a74225de76b.