| 〈TOPRED(t2 _ t3 _ t1; tn2)〉 tn2 = tn0, t2 .1 = S, tn0 ≠ none, n ≠ 0, t2 ≠ K, ap(t2), ¬ (value(t2 .2) ∧ value(t3) ∧ value(t1)) ⊦ |
〈TOPRED(t2 _ t3 _ t1; tn2)〉 tn2 = tn0, t0 = S, tn0 ≠ none, n ≠ 0, t2 ≠ K, ap(t2), ¬ (value(t4) ∧ value(t3) ∧ value(t1)), t2 = t0 _ t4 ⊦
[[CONCRETESIMPRULES : ([CSIMPELIM : ⊦ ap(t) → ( t0 = t .1 ∧ t1 = t .2 ↔ t = t0 _ t1)])], [EXTRATERMS : (t2, t, t0)]]