Section T11_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma l11_3_bis : forall A B C D E F,
(exists A', exists C', exists D', exists F',
Out B A' A /\ Out B C' C /\ Out E D' D /\ Out E F' F /\
Cong_3 A' B C' D' E F') -> CongA A B C D E F.