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Proof step 52 from proof leninv-inf (previous step)

stutf(nσ), (∀ n. ∃ n0. n < n0 ∧ (∃ m. ⌜m⌝ < # nσ ∧ nσ[m] = n0 - 1)) ∨ (∀ n. ¬(n ≠ 0 → (∃ m. ⌜m⌝ < # nσ ∧ nσ[m] = n - 1))) ⊦ ∀ n. # nσ ≠ ⌜n⌝

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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