Proofgold Proof

pf
Let x0 of type ο be given. Let x1 of type ο be given. Let x2 of type ο be given. The subproof is completed by applying unknownprop_c29620ea10188dd8ed7659bc2875dc8e08f16ffd29713f8ee3146f02f9828ceb with or x0 x1, x2. ■