Theorem ancld

Description: Deduction conjoining antecedent to left of consequent in nested implication. (Contributed by NM, 15-Aug-1994) (Proof shortened by Wolf Lammen, 1-Nov-2012)

	Ref	Expression
Hypothesis	ancld.1	⊢ ( 𝜑 → ( 𝜓 → 𝜒 ) )
Assertion	ancld	⊢ ( 𝜑 → ( 𝜓 → ( 𝜓 ∧ 𝜒 ) ) )

Proof

Step	Hyp	Ref	Expression
1		ancld.1	⊢ ( 𝜑 → ( 𝜓 → 𝜒 ) )
2		idd	⊢ ( 𝜑 → ( 𝜓 → 𝜓 ) )
3	2 1	jcad	⊢ ( 𝜑 → ( 𝜓 → ( 𝜓 ∧ 𝜒 ) ) )