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Theorem simp22 1015
Description: Simplification of doubly triple conjunction. (Contributed by NM, 17-Nov-2011.)
Assertion
Ref Expression
simp22  |-  ( (
ph  /\  ( ps  /\ 
ch  /\  th )  /\  ta )  ->  ch )

Proof of Theorem simp22
StepHypRef Expression
1 simp2 982 . 2  |-  ( ( ps  /\  ch  /\  th )  ->  ch )
213ad2ant2 1003 1  |-  ( (
ph  /\  ( ps  /\ 
ch  /\  th )  /\  ta )  ->  ch )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 962
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107
This theorem depends on definitions:  df-bi 116  df-3an 964
This theorem is referenced by:  simpl22  1060  simpr22  1069  simp122  1114  simp222  1123  simp322  1132  prarloclem5  7315
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