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Theorem truorfal 1501
Description: A identity. (Contributed by Anthony Hart, 22-Oct-2010.)
Assertion
Ref Expression
truorfal ((⊤ ∨ ⊥) ↔ ⊤)

Proof of Theorem truorfal
StepHypRef Expression
1 tru 1478 . . 3
21orci 403 . 2 (⊤ ∨ ⊥)
32bitru 1486 1 ((⊤ ∨ ⊥) ↔ ⊤)
Colors of variables: wff setvar class
Syntax hints:  wb 194  wo 381  wtru 1475  wfal 1479
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
This theorem depends on definitions:  df-bi 195  df-or 383  df-tru 1477
This theorem is referenced by: (None)
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