Theorem bnj721

Description: /\ -manipulation. (Contributed by Jonathan Ben-Naim, 3-Jun-2011) (New usage is discouraged.)

	Ref	Expression
Hypothesis	bnj721.1	|- ( ( ph /\ ps /\ ch ) -> ta )
Assertion	bnj721	|- ( ( ph /\ ps /\ ch /\ th ) -> ta )

Proof

Step	Hyp	Ref	Expression
1		bnj721.1	|- ( ( ph /\ ps /\ ch ) -> ta )
2		bnj658	|- ( ( ph /\ ps /\ ch /\ th ) -> ( ph /\ ps /\ ch ) )
3	2 1	syl	|- ( ( ph /\ ps /\ ch /\ th ) -> ta )