Require Export GeoCoq.Elements.OriginalProofs.proposition_23B.
Section Euclid.
Context `{Ax:euclidean_neutral_ruler_compass}.

(* Specifications: *)
Lemma proposition_23C :
forall A B C D E P,
neq A B -> nCol D C E -> nCol A B P ->
exists X Y, Out A B Y /\ CongA X A Y D C E /\ OS X P A B.