Theorem 3adant2

Description: Deduction adding a conjunct to antecedent. (Contributed by NM, 16-Jul-1995)

	Ref	Expression
Hypothesis	3adant.1	|- ( ( ph /\ ps ) -> ch )
Assertion	3adant2	|- ( ( ph /\ th /\ ps ) -> ch )

Proof

Step	Hyp	Ref	Expression
1		3adant.1	|- ( ( ph /\ ps ) -> ch )
2	1	adantlr	|- ( ( ( ph /\ th ) /\ ps ) -> ch )
3	2	3impa	|- ( ( ph /\ th /\ ps ) -> ch )