Let x0 of type ι be given.
Let x1 of type ι → ι be given.
Let x2 of type ι → ο be given.
Apply unknownprop_4b13af0994345cb2bf2bb7ad85bc935012652f874cfc879eb5167bd6f7e5286b with
da24e.. x0 x1 x2,
x0,
x1,
x2.
Let x3 of type ι → ι → ο be given.
The subproof is completed by applying H0.