Theorem ancli

Description: Deduction conjoining antecedent to left of consequent. (Contributed by NM, 12-Aug-1993)

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

Proof

Step	Hyp	Ref	Expression
1		ancli.1	$$⊢\phi \to \psi$$
2		id	$$⊢\phi \to \phi$$
3	2 1	jca	$$⊢\phi \to \left(\phi \wedge \psi \right)$$