Let x0 of type ι → (ι → ο) → ο be given.
Let x1 of type ι be given.
Let x2 of type ι → ο be given.
Assume H1: x0 x1 x2.
Apply unknownprop_df2ff7ab23c8ea39e7f5ea4f6d5677729f8f4e104427ae8df8ddcc2119ec044a with
x1,
x2,
x0,
x1,
x2 leaving 3 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying unknownprop_b88c7d2cc71b4f494bf94f485b6de710e53401c58179aa2c5662393601237d01 with x1, x2.