Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι be given.
Apply unknownprop_edb5429996c91ec36192294fa1b04f517f52304f16c5634ffedaaf1a606af853 with
x0,
x1,
x2,
x3,
x1 = x3 leaving 2 subgoals.
The subproof is completed by applying H0.
Assume H1: x0 = x2.
Assume H2: x1 = x3.
The subproof is completed by applying H2.