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Proof step 1 from proof four-01 (conclusion)
⊦ m ≠ 2 ∧ m ≠ 1 ∧ m ≠ 0 → (m < 4 ↔ m = 3)
System applied rule normalize
And obtained the following new goals
Proof step 2
:
⊦ m < 4 ↔ m = 3, m = 0, m = 1, m = 2
Rule argument
Additional information