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Proof step 1 from proof count-mkbag-greater-two (conclusion)

m1 < i, m < i, m0 < i, i ≤ # A, m ≠ m1, m0 ≠ m1, m ≠ m0, A[m] = a, A[m0] = a, A[m1] = a ⊦ count(a, mkbag(A, i)) > 2

System applied rule normalize

And obtained the following new goals

Proof step 2:
A[m1] = a, A[m0] = a, A[m] = a, m0 < i, m < i, m1 < i, i ≤ # A ⊦ m = m1, m = m0, m0 = m1, count(a, mkbag(A, i)) > 2

Rule argument

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