Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_56bd0714abefd533b13603d171a24196c02fb0b6a0af8036287a8ec089f8957d with
λ x2 x3 : ι → ο . x3 x0 ⟶ In x0 x1 ⟶ In (ap x0 1) (ap x1 (ap x0 0)).
Apply unknownprop_5790343a8368d4f3aa514e68a19a3e4824006be2aed8a0a7a707f542e4c79154 with
x1,
ap x0 0,
ap x0 1.
Apply H0 with
λ x2 x3 . In x3 x1.
The subproof is completed by applying H1.