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1 (* Basic_1: was: pr3_pr1 *)
2 lemma tprs_cprs: ∀G,L,T1,T2. ⦃G, ⋆⦄ ⊢ T1 ➡* T2 → ⦃G, L⦄ ⊢ T1 ➡* T2.
3 /2 width=3 by lsubr_cprs_trans/ qed.