Let x0 of type ι → ο be given.
Let x1 of type ι be given.
Apply unknownprop_6ac60177677a952bd52334115a5d601931bbfc355336cbc708a9f6bad40adc54 with
x0,
x1,
prim1 x1 (707e2.. x0) ⟶ x0 x1 leaving 2 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.