Theorem nexdh 1674

Description: Deduction for generalization rule for negated wff. (Contributed by NM, 2-Jan-2002.)

Hypotheses

Ref	Expression
nexdh.1
nexdh.2

Assertion

Ref	Expression
nexdh

Proof of Theorem nexdh

Step	Hyp	Ref	Expression
1		nexdh.1	. . 3
2		nexdh.2	. . 3
3	1, 2	alrimih 1642	. 2
4		alnex 1614	. 2
5	3, 4	sylib 196	1

Syntax hints:  -.wn 3  ->wi 4  A.wal 1393  E.wex 1612

This theorem is referenced by:  nexd  1883

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

This theorem depends on definitions:  df-bi 185  df-ex 1613