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Proof step 1 from proof two-loup-09 (conclusion)

⊦ (m + n) / 2 ≠ m ↔ ¬ ¬(m ≠ n ∧ m + 1 ≠ n)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ (m + n) / 2 ≠ m ↔ m ≠ n ∧ m + 1 ≠ n

Rule argument

Additional information