Lemma cop2_onc4__or_conga_suppa : forall O P A B C C', A <> B -> B <> C -> A <> C -> B <> C' -> A <> C' -> OnCircle A O P -> OnCircle B O P -> OnCircle C O P -> OnCircle C' O P -> Coplanar A B C O -> Coplanar A B C' O -> CongA A C B A C' B \/ SuppA A C B A C' B.