Theorem rexbiiOLD 2970

Description: Obsolete proof of rexbii 2959 as of 6-Dec-2019. (Contributed by NM, 23-Nov-1994.) (Revised by Mario Carneiro, 17-Oct-2016.) (Proof modification is discouraged.) (New usage is discouraged.)

Hypothesis

Ref	Expression
rexbiiOLD.1

Assertion

Ref	Expression
rexbiiOLD

Proof of Theorem rexbiiOLD

Step	Hyp	Ref	Expression
1		rexbiiOLD.1	. . . 4
2	1	a1i 11	. . 3
3	2	rexbidv 2968	. 2
4	3	trud 1404	1

Syntax hints:  <->wb 184  wtru 1396  E.wrex 2808

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704

This theorem depends on definitions:  df-bi 185  df-an 371  df-tru 1398  df-ex 1613  df-rex 2813