Theorem simp1ll 1062

Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012.)

Assertion

Ref	Expression
simp1ll	|- ( ( ( ( ph /\ ps ) /\ ch ) /\ th /\ ta ) -> ph )

Proof of Theorem simp1ll

Step	Hyp	Ref	Expression
1		simpll 527	. 2 |- ( ( ( ph /\ ps ) /\ ch ) -> ph )
2	1	3ad2ant1 1020	1 |- ( ( ( ( ph /\ ps ) /\ ch ) /\ th /\ ta ) -> ph )

Syntax hints:   -> wi 4   /\ wa 104   /\ w3a 980

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117  df-3an 982

This theorem is referenced by:  tfrcllembacc  6413  frecfcllem  6462