Let x0 of type ι be given.
Let x1 of type ι → ι → ο be given.
Apply unknownprop_89021d19369878dc13c120597054f110e43483c092010ab131cd79fd9c648d3d with
35983.. x0 x1,
x0,
x1.
Let x2 of type ι → ι → ο be given.
The subproof is completed by applying H0.