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Proof step 1 from proof elim-is-buf-suc (conclusion)

⊦ bleb.isbuf? ↔ bleb ≠ nobuffer

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ bleb = nobuffer, bleb.isbuf?

Rule argument

Additional information

Used simplifier rules: test-01: ⊦ ¬ nobuffer.isbuf?;