Apply unknownprop_f8517820c41e80abae5090668a4d7f9c31465f066f11281cc9990a74d008bfa1 with
λ x0 : ι → ι . λ x1 . x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 (x0 x1)))))))))))))).
The subproof is completed by applying unknownprop_b69aeea3b10b846ee5e419c1b471f03ef85ead2b77c13f4aa8b04c94af6c6775.