Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι → ι → ι be given.
Let x3 of type ι → ι → ι be given.
Apply unknownprop_90e0281ca50dd9937c4dc4598e4b18b763eeb528d21427cfd7d571699b566522 with
λ x4 . λ x5 : ι → ι → ι . a0fbb.. x1 x3 x4,
x0,
x2.
Let x4 of type ι → ι → ι be given.
Assume H0:
∀ x5 . prim1 x5 x0 ⟶ ∀ x6 . prim1 x6 x0 ⟶ x2 x5 x6 = x4 x5 x6.
Let x5 of type ο → ο → ο be given.
The subproof is completed by applying H1.