Theorem bj-19.21bit

Description: Closed form of 19.21bi . (Contributed by BJ, 20-Oct-2019)

	Ref	Expression
Assertion	bj-19.21bit	⊢ ( ( 𝜑 → ∀ 𝑥 𝜓 ) → ( 𝜑 → 𝜓 ) )

Proof

Step	Hyp	Ref	Expression
1		sp	⊢ ( ∀ 𝑥 𝜓 → 𝜓 )
2	1	imim2i	⊢ ( ( 𝜑 → ∀ 𝑥 𝜓 ) → ( 𝜑 → 𝜓 ) )