Theorem bj-falor 36560

Description: Dual of truan 1550 (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 1553	. 2 ⊢ ¬ ⊥
2	1	biorfi 938	1 ⊢ (𝜑 ↔ (⊥ ∨ 𝜑))

Syntax hints:   ↔ wb 206   ∨ wo 847  ⊥wfal 1551

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 207  df-or 848  df-tru 1542  df-fal 1552

This theorem is referenced by: (None)