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Proof step 15 from proof ex-oddeven (previous step)

⊦ ∃ i0. i0 + i0 = i + i ∨ 2 + i0 + i0 = i + i + 1

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

pos: right 1 terms: i

Additional information

Used terms: i