Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_55ac2036b2594a1420c3213980e6cc84263d48ba5c2b4b8c0dc5b53adbf2cdcc with
ZermeloWO x0,
ZermeloWO x1,
or (ZermeloWO x0 x1) (ZermeloWO x1 x0) leaving 4 subgoals.
The subproof is completed by applying unknownprop_1c5184f86aa281587f2541b20dafbf0fb59ed16c97a848ba15b898cfd0b2908e with x0.
The subproof is completed by applying unknownprop_1c5184f86aa281587f2541b20dafbf0fb59ed16c97a848ba15b898cfd0b2908e with x1.
Apply orIL with
ZermeloWO x0 x1,
ZermeloWO x1 x0.
Apply H0 with
x1.
The subproof is completed by applying ZermeloWO_ref with x1.
Apply orIR with
ZermeloWO x0 x1,
ZermeloWO x1 x0.
Apply H0 with
x0.
The subproof is completed by applying ZermeloWO_ref with x0.