Apply unknownprop_f8517820c41e80abae5090668a4d7f9c31465f066f11281cc9990a74d008bfa1 with
λ x0 : ι → ι . λ x1 . x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 x1))))))))))))).
The subproof is completed by applying unknownprop_c82ade8f2c47f0c96ae358976cd7afa49e9cf4aff130209e6d013c37dfa3ff3d.