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Proof step 1 from proof neq-05 (conclusion)

⊦ ¬ b ∈ x → c ' + x ≠ y + a ' + b ' + z

System applied rule normalize

And obtained the following new goals

Proof step 2:
c ' + x = y + a ' + b ' + z ⊦ b ∈ x

Rule argument

Additional information