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Proof step 34 from proof challenge3 (previous step)

b ∈ t1, ((tr(r2, t1) * r => mknode(null, a, r2)) * P)(H), (true * tr(r0, t1) * P)(H0), bst(t1), ∀ a0. a0 ∈ t1 → a < a0 ⊦ r = null, a < b

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 5, [QUANTTERMLIST : (b)]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (b)]]