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Proof step 1 from proof inni-le (conclusion)

⊦ i→n(i) ≤ n → ¬ n→i(n) < i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
n→i(n) < i, i→n(i) ≤ n, 0 < i ⊦

Rule argument

Additional information

Used simplifier rules: pos-int: ⊦ n→i(m) < j → 0 < j;