Theorem simplr1

Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012) (Proof shortened by Wolf Lammen, 23-Jun-2022)

	Ref	Expression
Assertion	simplr1	$$⊢\left(\left(\theta \wedge \left(\phi \wedge \psi \wedge \chi \right)\right)\wedge \tau \right)\to \phi$$

Proof

Step	Hyp	Ref	Expression
1		simp1	$$⊢\left(\phi \wedge \psi \wedge \chi \right)\to \phi$$
2	1	ad2antlr	$$⊢\left(\left(\theta \wedge \left(\phi \wedge \psi \wedge \chi \right)\right)\wedge \tau \right)\to \phi$$