Metamath Proof Explorer

Theorem simpr21

Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012) (Proof shortened by Wolf Lammen, 24-Jun-2022)

		Ref	Expression
	Assertion	simpr21	$⊢ (η \land (θ \land (φ \land ψ \land χ) \land τ)) \to φ$

Step	Hyp	Ref	Expression
1		simpr1	$⊢ (η \land (φ \land ψ \land χ)) \to φ$
2	1	3ad2antr2	$⊢ (η \land (θ \land (φ \land ψ \land χ) \land τ)) \to φ$