Theorem ad4ant23

Description: Deduction adding conjuncts to antecedent. (Contributed by Alan Sare, 17-Oct-2017) (Proof shortened by Wolf Lammen, 14-Apr-2022)

	Ref	Expression
Hypothesis	ad4ant2.1	⊢ ( ( 𝜑 ∧ 𝜓 ) → 𝜒 )
Assertion	ad4ant23	⊢ ( ( ( ( 𝜃 ∧ 𝜑 ) ∧ 𝜓 ) ∧ 𝜏 ) → 𝜒 )

Proof

Step	Hyp	Ref	Expression
1		ad4ant2.1	⊢ ( ( 𝜑 ∧ 𝜓 ) → 𝜒 )
2	1	adantr	⊢ ( ( ( 𝜑 ∧ 𝜓 ) ∧ 𝜏 ) → 𝜒 )
3	2	adantlll	⊢ ( ( ( ( 𝜃 ∧ 𝜑 ) ∧ 𝜓 ) ∧ 𝜏 ) → 𝜒 )