⊦ H0 = H1 ↔ (∀ r. (r ∈ H0 ↔ r ∈ H1) ∧ (r ∈ H0 → H0[r] = H1[r]))
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (H0 ∪ H1 ∪ H, (H0 ∪ H1) ∪ H)]]