Hint Resolve col_permutation_1 col_permutation_2
col_permutation_3 col_permutation_4 col_permutation_5 : sTarski.
Hint Resolve col_permutation_1 col_permutation_2
col_permutation_3 col_permutation_4 col_permutation_5 : Col.
Ltac Col := eauto with Col.
(** Trivial lemmas for Col. *)

Lemma col_trivial_2 : forall A B, Col A B B.