Require Export GeoCoq.Meta_theory.Parallel_postulates.parallel_postulates.
Require Export GeoCoq.Meta_theory.Parallel_postulates.par_trans_NID.
Section T13.
Context `{TE:Tarski_euclidean}.

Lemma cop_npars__inter_exists :
forall A1 B1 A2 B2,
Coplanar A1 B1 A2 B2 -> ~ Par_strict A1 B1 A2 B2 ->
exists X, Col X A1 B1 /\ Col X A2 B2.