Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_e277188ae242e07bd6727f267e38747aecd739d129890076e65b92339f7beb98 with
x0,
x1,
∀ x2 . prim1 x2 x0 ⟶ 099f3.. x2 (02a50.. x0 x1) leaving 2 subgoals.
The subproof is completed by applying H0.