(* Note: This invalidates lfpxs_cpx_conf: "∀h,G. s_r_confluent1 … (cpx h G) (lfpxs h G)" *)
(* Note: "⦃L2, T1⦄ ⊆ ⦃L0, T1⦄" may not hold *)
(* Basic_2A1: uses: lpx_cpx_frees_trans *)
(* Note: This invalidates lfpxs_cpx_conf: "∀h,G. s_r_confluent1 … (cpx h G) (lfpxs h G)" *)
(* Note: "⦃L2, T1⦄ ⊆ ⦃L0, T1⦄" may not hold *)
(* Basic_2A1: uses: lpx_cpx_frees_trans *)