Section T11_1.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.

Lemma conga_line : forall A B C A' B' C',
A <> B -> B <> C -> A' <> B' -> B' <> C' -> Bet A B C -> Bet A' B' C' ->
CongA A B C A' B' C'.