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Theorem simp1l1 997
Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012.)
Assertion
Ref Expression
simp1l1  |-  ( ( ( ( ph  /\  ps  /\  ch )  /\  th )  /\  ta  /\  et )  ->  ph )

Proof of Theorem simp1l1
StepHypRef Expression
1 simpl1 907 . 2  |-  ( ( ( ph  /\  ps  /\ 
ch )  /\  th )  ->  ph )
213ad2ant1 925 1  |-  ( ( ( ( ph  /\  ps  /\  ch )  /\  th )  /\  ta  /\  et )  ->  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: (None)
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