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Theorem anabsi8 818
Description: Absorption of antecedent into conjunction. (Contributed by NM, 26-Sep-1999.)
Hypothesis
Ref Expression
anabsi8.1  |-  ( ps 
->  ( ( ps  /\  ph )  ->  ch )
)
Assertion
Ref Expression
anabsi8  |-  ( (
ph  /\  ps )  ->  ch )

Proof of Theorem anabsi8
StepHypRef Expression
1 anabsi8.1 . . 3  |-  ( ps 
->  ( ( ps  /\  ph )  ->  ch )
)
21anabsi5 815 . 2  |-  ( ( ps  /\  ph )  ->  ch )
32ancoms 453 1  |-  ( (
ph  /\  ps )  ->  ch )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    /\ wa 369
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-an 371
This theorem is referenced by: (None)
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