Theorem neneqadOLD 2766

Description: Obsolete proof of neqned 2660 (formerly "neneqad") as of 22-Nov-2019. (Contributed by David Moews, 28-Feb-2017.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
neneqadOLD.1

Assertion

Ref	Expression
neneqadOLD

Proof of Theorem neneqadOLD

Step	Hyp	Ref	Expression
1		neneqadOLD.1	. . 3
2	1	con2i 120	. 2
3	2	necon2ai 2692	1

Syntax hints:  -.wn 3  ->wi 4  =wceq 1395  =/=wne 2652

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 185  df-ne 2654