Theorem uun123p1

Description: A deduction unionizing a non-unionized collection of virtual hypotheses. (Contributed by Alan Sare, 4-Feb-2017) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Hypothesis	uun123p1.1	|- ( ( ps /\ ph /\ ch ) -> th )
Assertion	uun123p1	|- ( ( ph /\ ps /\ ch ) -> th )

Proof

Step	Hyp	Ref	Expression
1		uun123p1.1	|- ( ( ps /\ ph /\ ch ) -> th )
2	1	3com12	|- ( ( ph /\ ps /\ ch ) -> th )