Let x0 of type ι be given.
Let x1 of type ι → ο be given.
Let x2 of type ι → ο be given.
Apply unknownprop_4125edfaa663fb2e6dd34cdea45a69cd2dba42a6f817ad482c410d7204d78c46 with
2c81e.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.