Theorem simp2r1

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

	Ref	Expression
Assertion	simp2r1	|- ( ( ta /\ ( th /\ ( ph /\ ps /\ ch ) ) /\ et ) -> ph )

Proof

Step	Hyp	Ref	Expression
1		simpr1	|- ( ( th /\ ( ph /\ ps /\ ch ) ) -> ph )
2	1	3ad2ant2	|- ( ( ta /\ ( th /\ ( ph /\ ps /\ ch ) ) /\ et ) -> ph )