Let x0 of type ι be given.
Let x1 of type ι → ι be given.
Let x2 of type ι be given.
Apply unknownprop_3189570886a432a72e87efcbd0ea995fafcd88c6ec3c7fdffceb2e344a826cdc with
x2,
λ x3 x4 . In x2 (lam x0 (λ x5 . x1 x5)) ⟶ In x3 x0.
The subproof is completed by applying unknownprop_5602d478ac2925d3761ba3ec5f78288f7907f59db6d1b15212dcf9b70f55d5f8 with x0, λ x3 . x1 x3, x2.