Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Apply unknownprop_dc174ec111ea4d338d202a165e50003c0670f55cf829873f077c5d83716919ce with
x0,
x2,
x1 leaving 2 subgoals.
The subproof is completed by applying H0.
Apply unknownprop_43b9163da17f2f66e991f3dd23439608e22bc07ac3880a089612020a7b3f5243 with
x1,
x2 leaving 2 subgoals.
The subproof is completed by applying H1.
The subproof is completed by applying H2.