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Theorem falortru 1370
Description: A identity. (Contributed by Anthony Hart, 22-Oct-2010.)
Assertion
Ref Expression
falortru ((⊥ ∨ ⊤) ↔ ⊤)

Proof of Theorem falortru
StepHypRef Expression
1 tru 1320 . . 3
21olci 706 . 2 (⊥ ∨ ⊤)
32bitru 1328 1 ((⊥ ∨ ⊤) ↔ ⊤)
Colors of variables: wff set class
Syntax hints:  wb 104  wo 682  wtru 1317  wfal 1321
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 683
This theorem depends on definitions:  df-bi 116  df-tru 1319
This theorem is referenced by:  falxortru  1384
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