Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type (ι → ο) → ο be given.
Apply H0 with
λ x3 x4 . x1 = f482f.. x4 4a7ef...
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying unknownprop_67d8fddea88125b50903f4bd482ed1753cb719c67016df79894ab3055421315b with
x1,
e0e40.. x1 x2,
λ x4 x5 . x3 x5 x4.