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Proof step 15 from proof gcdnex (previous step)

⊦ ∃ n. n ≠ 0 ∧ n ≠ 1

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

pos: right 1 terms: 1 +1 +1

Additional information

Used terms: 1 +1 +1