Theorem simp3ll 1020

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

Assertion

Ref	Expression
simp3ll	|- ( ( th /\ ta /\ ( ( ph /\ ps ) /\ ch ) ) -> ph )

Proof of Theorem simp3ll

Step	Hyp	Ref	Expression
1		simpll 499	. 2 |- ( ( ( ph /\ ps ) /\ ch ) -> ph )
2	1	3ad2ant3 972	1 |- ( ( th /\ ta /\ ( ( ph /\ ps ) /\ ch ) ) -> ph )

Syntax hints:   -> wi 4   /\ wa 103   /\ w3a 930

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem depends on definitions:  df-bi 116  df-3an 932

This theorem is referenced by:  f1oiso2  5660  prarloc  7212  tgqioo  12466