Let x0 of type ι be given.
Let x1 of type ι → ι → ο be given.
Let x2 of type ι → ο be given.
Apply unknownprop_afed1dc8267e92a2f80c1d93724389c0c3bd48817d2a53d5ebc4ebe768c4d026 with
42836.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.