Let x0 of type ι be given.
Let x1 of type ι → ο be given.
Let x2 of type ι be given.
Apply unknownprop_f7ba923a48e879b1ae29842e5381780ef855848ef1312b826f3310a937c24959 with
5f5a0.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.