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Proof step 1 from proof in-mkbag-del (conclusion)

i ≤ # A, m < i, n < i, n ≠ m ⊦ A[m] ∈ mkbag(A, i) -- A[n]

System applied rule normalize

And obtained the following new goals

Proof step 2:
n < i, m < i, i ≤ # A ⊦ n = m, A[m] ∈ mkbag(A, i) -- A[n]

Rule argument

Additional information