Let x0 of type ι be given.
Let x1 of type (ι → ο) → ο be given.
Let x2 of type ι → ι → ο be given.
Apply unknownprop_bff289cd8d1aaa07133bba635740af6ea15f8ff498a11754d792624ae111fe25 with
36e8b.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.