Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι be given.
Apply H0 with
λ x4 x5 . x2 = f482f.. x5 (4ae4a.. 4a7ef..).
Let x4 of type ι → ι → ο be given.
The subproof is completed by applying unknownprop_d7d39a6ae9dd573b529ad4d558553a3d5dfa88cfa249f628a74ae5b338307a3e with x1, x2, x3, λ x5 x6 . x4 x6 x5.