Let x0 of type ι be given.
Let x1 of type ι → ι be given.
Let x2 of type ι → ο be given.
Apply unknownprop_2ba90cf2f1bad22d52324b8a9d49d12605b3e60e675a235b08e1c6aed0bca2b7 with
da24e.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.