Section Gupta_inspired_variant_of_Tarski_neutral_dimensionless_to_Tarski_neutral_dimensionless.
Context `{ITnEQD:Gupta_inspired_variant_of_Tarski_neutral_dimensionless_with_decidable_point_equality}.
Definition ColG A B C := BetG A B C \/ BetG B C A \/ BetG C A B.

Lemma col_decG : forall A B C, ColG A B C \/ ~ ColG A B C.