Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι → ι → ο be given.
Let x3 of type ι be given.
Apply H0 with
λ x4 x5 . x3 = f482f.. x5 (4ae4a.. (4ae4a.. 4a7ef..)).
Let x4 of type ι → ι → ο be given.
The subproof is completed by applying unknownprop_7a16b690fe761b47a98a266409f7c10953d45924d4b6dee50c46a27a0cf018bb with
x1,
d2155.. x1 x2,
x3,
λ x5 x6 . x4 x6 x5.