Theorem simp1rr

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

	Ref	Expression
Assertion	simp1rr	|- ( ( ( ch /\ ( ph /\ ps ) ) /\ th /\ ta ) -> ps )

Proof

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