Let x0 of type ι be given.
Let x1 of type ι → ο be given.
Let x2 of type ι → ο be given.
Apply unknownprop_fb6c110c2cbffe18be59b42f6db3e7101de679621d0bf6e46d0c8efc4991b380 with
2c81e.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.