Let x0 of type ο be given.
Let x1 of type ο be given.
Assume H0: x0 ⟶ x1.
Assume H1: x1 ⟶ x0.
Apply unknownprop_b721f4f18dab854a9c2f0364e7fd5ead1b477fed2e73a22ec4a16267b9cc37cb with
x0,
x1.
Apply unknownprop_a818f53272de918398012791887b763f90bf043f961a4f625d98076ca0b8b392 with
x0,
x1 leaving 2 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.