Theorem anabsi6 580

Description: Absorption of antecedent into conjunction. (Contributed by NM, 14-Aug-2000.)

Hypothesis

Ref	Expression
anabsi6.1	|- ( ph -> ( ( ps /\ ph ) -> ch ) )

Assertion

Ref	Expression
anabsi6	|- ( ( ph /\ ps ) -> ch )

Proof of Theorem anabsi6

Step	Hyp	Ref	Expression
1		anabsi6.1	. . 3 |- ( ph -> ( ( ps /\ ph ) -> ch ) )
2	1	ancomsd 269	. 2 |- ( ph -> ( ( ph /\ ps ) -> ch ) )
3	2	anabsi5 579	1 |- ( ( ph /\ ps ) -> ch )

Syntax hints:   -> wi 4   /\ wa 104

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117

This theorem is referenced by:  anabsi7  581