Let x0 of type ο be given.
Let x1 of type ο be given.
Assume H0: x0 ⟶ x1.
Assume H1: x1 ⟶ x0.
Apply unknownprop_535a42de1055bca61f176bc11115db76b3356ad18505799408acb5bdbd2addc1 with
λ x2 x3 : ο → ο → ο . x3 x0 x1.
Apply unknownprop_389e2fb1855352fcc964ea44fe6723d7a1c2d512f04685300e3e97621725b977 with
x0 ⟶ x1,
x1 ⟶ x0 leaving 2 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.