Metamath Proof Explorer

Theorem simp-4l

Description: Simplification of a conjunction. (Contributed by Mario Carneiro, 4-Jan-2017) (Proof shortened by Wolf Lammen, 24-May-2022)

		Ref	Expression
	Assertion	simp-4l	$⊢ ((((φ \land ψ) \land χ) \land θ) \land τ) \to φ$

Step	Hyp	Ref	Expression
1		id	$⊢ φ \to φ$
2	1	ad4antr	$⊢ ((((φ \land ψ) \land χ) \land θ) \land τ) \to φ$