Theorem nfnthOLD 1736

Description: Obsolete proof of nfnth 1728 as of 6-Oct-2021. (Contributed by Mario Carneiro, 6-Dec-2016.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
nfnthOLD.1	|- -. ph

Assertion

Ref	Expression
nfnthOLD	|- F/ x ph

Proof of Theorem nfnthOLD

Step	Hyp	Ref	Expression
1		nfnthOLD.1	. . 3 |- -. ph
2	1	pm2.21i 116	. 2 |- ( ph -> A. x ph )
3	2	nfiOLD 1734	1 |- F/ x ph

Syntax hints:   -. wn 3   A.wal 1481   F/wnfOLD 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)