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Theorem simpl1l 955
Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012.)
Assertion
Ref Expression
simpl1l  |-  ( ( ( ( ph  /\  ps )  /\  ch  /\  th )  /\  ta )  ->  ph )

Proof of Theorem simpl1l
StepHypRef Expression
1 simp1l 928 . 2  |-  ( ( ( ph  /\  ps )  /\  ch  /\  th )  ->  ph )
21adantr 261 1  |-  ( ( ( ( ph  /\  ps )  /\  ch  /\  th )  /\  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:  tfisi  4310  prarloc  6601
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