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Proof step 32 from proof nextl-lemma-butlast (previous step)

⊦ ∀ n. ∃ lf. lf(0) = a ' ∧ (∀ m. m < n → lf(m + 1) = nextl(m, lf(m).last)), ∃ lf. lf(0) = a ' ∧ (∀ n. lf(n + 1) = nextl(n, lf(n).last))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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