Apply unknownprop_7286e98d609aa746e0fd442fb25d48ecc298d66ff863c06370951cf0a76dad5e with
λ x0 x1 : ι → ι . ∀ x2 x3 . In x3 (x1 x2) ⟶ x3 = x2.
Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_75ddf832b1631756e4bbf96a65e15fca654982aa51c8799a97b68da7b8a2da12 with
x1,
x0,
x0,
x1 = x0 leaving 3 subgoals.
The subproof is completed by applying H0.
Assume H1: x1 = x0.
The subproof is completed by applying H1.
Assume H1: x1 = x0.
The subproof is completed by applying H1.