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Proof step 6 from proof eq (previous step)

i0 = j + i0, ∀ j. i0 = i0 + j → j = 0 ⊦ j = 0

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 2 terms: j

Additional information

Used simplifier rules: add-c: ⊦ i + j = j + i; Used terms: j