Theorem nfthOLD 1735

Description: Obsolete proof of nfth 1727 as of 5-Oct-2021. (Contributed by Mario Carneiro, 11-Aug-2016.) (New usage is discouraged.) (Proof modification is discouraged.)

Hypothesis

Ref	Expression
nfthOLD.1	⊢ 𝜑

Assertion

Ref	Expression
nfthOLD	⊢ Ⅎ𝑥𝜑

Proof of Theorem nfthOLD

Step	Hyp	Ref	Expression
1		nfthOLD.1	. . 3 ⊢ 𝜑
2	1	hbth 1729	. 2 ⊢ (𝜑 → ∀𝑥𝜑)
3	2	nfiOLD 1734	1 ⊢ Ⅎ𝑥𝜑

Syntax hints:  ℲwnfOLD 1709

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722

This theorem depends on definitions:  df-bi 197  df-nfOLD 1721

This theorem is referenced by: (None)