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Proof step 1 from proof to-plus-from-inf-simp (conclusion)

⊦ ⌜nf to n⌝ + ⌜nf from n⌝ ≠ ⌜nf⌝ ↔ false

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ ⌜nf to n⌝ + ⌜nf from n⌝ = ⌜nf⌝

Rule argument

Additional information