Theorem simp1lr

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

	Ref	Expression
Assertion	simp1lr	|- ( ( ( ( ph /\ ps ) /\ ch ) /\ th /\ ta ) -> ps )

Proof

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