Let x0 of type ι be given.
Let x1 of type (ι → ο) → ο be given.
Let x2 of type ι → ι → ι be given.
Apply unknownprop_1e110a2b0eac66e464fcd0049e51159c6573a7f238676ed96b2b7556f087fb8f with
e0718.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.