Theorem rexbidvaALT 2966

Description: Alternative, shorter proof of rexbida 2963, that bases on more axioms. (Contributed by NM, 9-Mar-1997.) (New usage is discouraged.) (Proof modification is discouraged.)

Hypothesis

Ref	Expression
rexbidva.1

Assertion

Ref	Expression
rexbidvaALT

Distinct variable group:   ,

Proof of Theorem rexbidvaALT

Step	Hyp	Ref	Expression
1		nfv 1707	. 2
2		rexbidva.1	. 2
3	1, 2	rexbida 2963	1

Syntax hints:  ->wi 4  <->wb 184  /\wa 369  e.wcel 1818  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  ax-6 1747  ax-7 1790  ax-12 1854

This theorem depends on definitions:  df-bi 185  df-an 371  df-ex 1613  df-nf 1617  df-rex 2813