Let x0 of type ι be given.
Let x1 of type ι → ι → ο be given.
Let x2 of type ι → ι → ο be given.
Apply unknownprop_237b5681a996677ca62066427076d4a6abf98d316bb4d8323ccb2d00265ccea5 with
08354.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.