Theorem simp23l

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

	Ref	Expression
Assertion	simp23l	⊢ ( ( 𝜏 ∧ ( 𝜒 ∧ 𝜃 ∧ ( 𝜑 ∧ 𝜓 ) ) ∧ 𝜂 ) → 𝜑 )

Proof

Step	Hyp	Ref	Expression
1		simp3l	⊢ ( ( 𝜒 ∧ 𝜃 ∧ ( 𝜑 ∧ 𝜓 ) ) → 𝜑 )
2	1	3ad2ant2	⊢ ( ( 𝜏 ∧ ( 𝜒 ∧ 𝜃 ∧ ( 𝜑 ∧ 𝜓 ) ) ∧ 𝜂 ) → 𝜑 )