Theorem ssidd

Description: Weakening of ssid . (Contributed by BJ, 1-Sep-2022)

	Ref	Expression
Assertion	ssidd	⊢ ( 𝜑 → 𝐴 ⊆ 𝐴 )

Proof

Step	Hyp	Ref	Expression
1		ssid	⊢ 𝐴 ⊆ 𝐴
2	1	a1i	⊢ ( 𝜑 → 𝐴 ⊆ 𝐴 )