Theorem simp1ll 1050

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 519	. 2 |- ( ( ( ph /\ ps ) /\ ch ) -> ph )
2	1	3ad2ant1 1008	1 |- ( ( ( ( ph /\ ps ) /\ ch ) /\ th /\ ta ) -> ph )

Syntax hints:   -> wi 4   /\ wa 103   /\ w3a 968

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 970

This theorem is referenced by:  tfrcllembacc  6323  frecfcllem  6372