Theorem bddc 14665

Description: Decidability of a bounded formula is bounded. (Contributed by BJ, 3-Oct-2019.)

Hypothesis

Ref	Expression
bdstab.1	⊢ BOUNDED 𝜑

Assertion

Ref	Expression
bddc	⊢ BOUNDED DECID 𝜑

Proof of Theorem bddc

Step	Hyp	Ref	Expression
1		bdstab.1	. . 3 ⊢ BOUNDED 𝜑
2	1	ax-bdn 14654	. . 3 ⊢ BOUNDED ¬ 𝜑
3	1, 2	ax-bdor 14653	. 2 ⊢ BOUNDED (𝜑 ∨ ¬ 𝜑)
4		df-dc 835	. 2 ⊢ (DECID 𝜑 ↔ (𝜑 ∨ ¬ 𝜑))
5	3, 4	bd0r 14662	1 ⊢ BOUNDED DECID 𝜑

Syntax hints:  ¬ wn 3   ∨ wo 708  DECID wdc 834  BOUNDED wbd 14649

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-bd0 14650  ax-bdor 14653  ax-bdn 14654

This theorem depends on definitions:  df-bi 117  df-dc 835

This theorem is referenced by: (None)