Theorem nfvOLD 1871

Description: Obsolete proof of nfv 1843 as of 5-Oct-2021. (Contributed by Mario Carneiro, 11-Aug-2016.) (Proof modification is discouraged.) (New usage is discouraged.)

Assertion

Ref	Expression
nfvOLD	|- F/ x ph

Distinct variable group:   ph, x

Proof of Theorem nfvOLD

Step	Hyp	Ref	Expression
1		ax-5 1839	. 2 |- ( ph -> A. x ph )
2	1	nfiOLD 1734	1 |- F/ x ph

Syntax hints:   F/wnfOLD 1709

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-5 1839

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

This theorem is referenced by:  nfvdOLD  1872