Let x0 of type ι be given.
Let x1 of type ι → ο be given.
Let x2 of type ι be given.
Apply unknownprop_e4362c04e65a765de9cf61045b78be0adc0f9e51a17754420e1088df0891ff67 with
x0,
x1,
x2,
prim1 x2 x0 leaving 2 subgoals.
The subproof is completed by applying H0.
Assume H2: x1 x2.
The subproof is completed by applying H1.