Theorem uunT21

Description: A deduction unionizing a non-unionized collection of virtual hypotheses. (Contributed by Alan Sare, 3-Dec-2015) (Proof modification is discouraged.) (New usage is discouraged.) (Proof modification is discouraged.) (New usage is discouraged.)

	Ref	Expression
Hypothesis	uunT21.1	$$⊢\left(\top \wedge \left(\phi \wedge \psi \right)\right)\to \chi$$
Assertion	uunT21	$$⊢\left(\phi \wedge \psi \right)\to \chi$$

Proof

Step	Hyp	Ref	Expression
1		uunT21.1	$$⊢\left(\top \wedge \left(\phi \wedge \psi \right)\right)\to \chi$$
2	1	uunT1	$$⊢\left(\phi \wedge \psi \right)\to \chi$$