Apply unknownprop_09a15e4a4a26a9e483412f704016420ed6a01f84c815d73b065b7804e5d926a9 with
λ x0 x1 : ι → ι → ι . ∀ x2 x3 x4 . In x4 x2 ⟶ nIn x4 x3 ⟶ In x4 (x1 x2 x3).
Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Apply unknownprop_646b3add51cf8f8e84959b456822a93c7e59b2f394a14897b6752b9d28c1a75d with
x0,
λ x3 . nIn x3 x1,
x2 leaving 2 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.