let elim_intros_simpl = PrimitiveTactics.elim_intros_simpl_tac
let elim_type = EliminationTactics.elim_type_tac
let exact = PrimitiveTactics.exact_tac
let exists = IntroductionTactics.exists_tac
let elim_intros_simpl = PrimitiveTactics.elim_intros_simpl_tac
let elim_type = EliminationTactics.elim_type_tac
let exact = PrimitiveTactics.exact_tac
let exists = IntroductionTactics.exists_tac