Theorem bj-falor 33913

Description: Dual of truan 1544 (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

Step	Hyp	Ref	Expression
1		fal 1547	. 2 ⊢ ¬ ⊥
2	1	bj-biorfi 33912	1 ⊢ (𝜑 ↔ (⊥ ∨ 𝜑))

Syntax hints:   ↔ wb 208   ∨ wo 843  ⊥wfal 1545

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 209  df-or 844  df-tru 1536  df-fal 1546

This theorem is referenced by: (None)