Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_c3fe42b21df0810041479a97b374de73f7754e07c8af1c88386a1e7dc0aad10f with
binintersect x0 x1,
x1.
The subproof is completed by applying unknownprop_112a00d6b07a2d6f2243ede1b846dee44833903aa8abe832979302cb28081543 with x0, x1.