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theorem proved term proof

mp_holds

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formal statement (Lean)

  19theorem mp_holds : MP := by

proof body

Term-mode proof.

  20  intro h
  21  rcases h with ⟨⟨r, _⟩, _⟩
  22  cases r
  23
  24/-- Alias used in the manuscript: "Nonexistence cannot recognize itself." -/

used by (2)

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depends on (4)

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