Section PerpBisect_3.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma perp_bisect_existence_cop : forall A B C,
A <> B -> exists P, exists Q, Perp_bisect P Q A B /\ Coplanar A B C P /\
Coplanar A B C Q.