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Theorem simp2ll 971
Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012.)
Assertion
Ref Expression
simp2ll  |-  ( ( th  /\  ( (
ph  /\  ps )  /\  ch )  /\  ta )  ->  ph )

Proof of Theorem simp2ll
StepHypRef Expression
1 simpll 481 . 2  |-  ( ( ( ph  /\  ps )  /\  ch )  ->  ph )
213ad2ant2 926 1  |-  ( ( th  /\  ( (
ph  /\  ps )  /\  ch )  /\  ta )  ->  ph )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 97    /\ w3a 885
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101
This theorem depends on definitions:  df-bi 110  df-3an 887
This theorem is referenced by:  tfrlem5  5930
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