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Theorem bj-falor 32875
Description: Dual of truan 1650 (which has biconditional reversed). (Contributed by BJ, 26-Oct-2019.) (Proof modification is discouraged.)
Assertion
Ref Expression
bj-falor (𝜑 ↔ (⊥ ∨ 𝜑))

Proof of Theorem bj-falor
StepHypRef Expression
1 fal 1639 . 2 ¬ ⊥
21bj-biorfi 32874 1 (𝜑 ↔ (⊥ ∨ 𝜑))
Colors of variables: wff setvar class
Syntax hints:  wb 196  wo 382  wfal 1637
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 197  df-or 384  df-tru 1635  df-fal 1638
This theorem is referenced by: (None)
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