Let x0 of type ι be given.
Let x1 of type ι → ι → ι be given.
Let x2 of type ι → ι → ο be given.
Apply unknownprop_42c251d080734b987c7b75a68b22472a6b375cad07910cddc2743318f46cb2aa with
b5cc3.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.