Let x0 of type ι be given.
Let x1 of type ι → ι → ι be given.
Let x2 of type ι be given.
Apply unknownprop_e658baba45ea7d6e451cc4ecb0dd3e4967ee1b29d7f3d99f44f0725bef0dba54 with
96158.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.