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Proof step 6 from proof idexcept-comm (previous step)

# ar1 = # ar0, m < # ar0, ∀ m. m < # ar0 ∧ m ≠ n → ar1[m] = ar0[m] ⊦ # ar0 = 0, m = n, ar0[m] = ar1[m]

Heuristic quantifier closing applied rule all left

And closed the goal!

Rule argument

pos: left 3 terms: m

Additional information

Used terms: m