Theorem simp1rl

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

	Ref	Expression
Assertion	simp1rl	|- ( ( ( ch /\ ( ph /\ ps ) ) /\ th /\ ta ) -> ph )

Proof

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