Theorem simp3lr

Description: Simplification of conjunction. (Contributed by NM, 9-Mar-2012)

	Ref	Expression
Assertion	simp3lr	⊢ ( ( 𝜃 ∧ 𝜏 ∧ ( ( 𝜑 ∧ 𝜓 ) ∧ 𝜒 ) ) → 𝜓 )

Proof

Step	Hyp	Ref	Expression
1		simplr	⊢ ( ( ( 𝜑 ∧ 𝜓 ) ∧ 𝜒 ) → 𝜓 )
2	1	3ad2ant3	⊢ ( ( 𝜃 ∧ 𝜏 ∧ ( ( 𝜑 ∧ 𝜓 ) ∧ 𝜒 ) ) → 𝜓 )