Let x0 of type ι be given.
Let x1 of type (ι → ο) → ο be given.
Let x2 of type ι → ι be given.
Let x3 of type ι be given.
Apply unknownprop_e27eedcfb08bd7c15820442e85878590a6a903bd1de232b31b37c1b32fcdb587 with
eb2d9.. x0 x1 x2 x3,
x0,
x1,
x2,
x3.
Let x4 of type ι → ι → ο be given.
The subproof is completed by applying H0.