Let x0 of type ο be given.
Let x1 of type ο be given.
Assume H0: x0.
Apply unknownprop_1c24d71501e8770c98a2a55ffc20efbf99a75199b54cab0238128ab64306e471 with
λ x2 x3 : ο → ο → ο . x3 x0 x1.
Let x2 of type ο be given.
Assume H1: x0 ⟶ x2.
Assume H2: x1 ⟶ x2.
Apply H1.
The subproof is completed by applying H0.