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@@ -37,7 +37,7 @@ interpretation
 lemma fquq_refl: ∀b. tri_reflexive … (fquq b).
 // qed.
 
-lemma fqu_fquq: â\88\80b,G1,G2,L1,L2,T1,T2. â¦\83G1,L1,T1â¦\84 â\8a\90[b] â¦\83G2,L2,T2â¦\84 â\86\92 â¦\83G1,L1,T1â¦\84 â\8a\90⸮[b] ⦃G2,L2,T2⦄.
+lemma fqu_fquq: â\88\80b,G1,G2,L1,L2,T1,T2. â¦\83G1,L1,T1â¦\84 â¬\82[b] â¦\83G2,L2,T2â¦\84 â\86\92 â¦\83G1,L1,T1â¦\84 â¬\82⸮[b] ⦃G2,L2,T2⦄.
 /2 width=1 by or_introl/ qed.
 
 (* Basic_2A1: removed theorems 8: