Let x0 of type ι be given.
Let x1 of type ι → ι be given.
Let x2 of type ι → ο be given.
Let x3 of type ι be given.
Let x4 of type ι be given.
Apply unknownprop_225236b53fc1094b998a6dbb712971048518f8f99dcf909189300a5db2714fb7 with
726e4.. x0 x1 x2 x3 x4,
x0,
x1,
x2,
x3,
x4.
Let x5 of type ι → ι → ο be given.
The subproof is completed by applying H0.